Amazon.com: Customer reviews: Samsung 64GB USB 3.0 Flash Drive Duo (MUF-64CB/AM)

Reviewed in the United States on September 24, 2016

Samsung 128GB USB 3.0 Flash Drive Duo (MUF-128CB/AM)
Sold by: Amazon.com LLC

Wow, what a great thing, technology. My first USB flash (thumb) drive was only 512MB and cost more than twice what I paid for this 128GB drive.

This drive is not only fast, but versatile. With the two USB connections and OTG support, it works great for transfering files between my android phone (HTC One(M8)) and my computers. Well, primarily for carrying data with me that I don't want to keep on the phone. And I carry it with me often since I sometimes need to run the PortableApps stored on it for maintenance on friends' computers. I also use it as a mini-backup for my laptop.

The speed is very impressive. I've been using it for nine months now and have it 80% full. I ran another benchmark today, but the difference is neglible even though I had several applications running. I didn't even bother saving a screen cap of the test since it was so close. FWIW, the first test was done on Windows 8 (8.1?) with no other windows open and the second done on Windows 10 with multiple apps running in windows as well as the background. I had Task Manager and Resource Monitor running during both tests. The Samsung 128GB drive is not the fastest I've tested, but certainly the fastest I've seen with this capacity - and the only drive I've owned with the dual interfaces.

Yes, it does get rather warm during long sessions. Hot enough that I put a drop of water on the metal to aid in cooling. Probably not necessary - after all, the metal already conducts heat better than plastic.

The only con (for me) is that I cannot easily remove the PCB from this compact metal housing and make a custom wooden flash drive with it. Of course, that cannot reflect against the manufacturer or the performance of this drive. Besides, as much as I like wood, I don't think it would be as advantageous as the tiny form factor of this drive.

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W. Kwok

Worked great before it died, but it's got a 10 year* warranty

Reviewed in the United States on November 2, 2016

Size: 128 GBVerified Purchase

This was my first Samsung flash drive purchase. I wanted a USB 3.0 device and I liked the overall aesthetic of this drive, with the aluminum body and cap which was easily held on with a lanyard string to prevent it from getting lost. The drive itself is very compact and easy to lose if you don't keep it somewhere conspicuous. I just kept it on my key-chain and that worked for me. It also came in handy when I needed quick access to the USB drive. I was able to store and transfer so many files with the 128GB capacity. The USB 3.0 speed was a welcome addition. I purchased this in March and it just died at the end of June, so I got 4 months of usage before it died. Luckily, this drive is backed by a 10 year warranty from Amazon. I was not aware of this until I contacted Samsung for warranty service. They wrote the following email to me:

"Please contact Amazon for Warranty service as they are under contract to fulfill the warranty for units purchased from their site. The contract they are under requires them to replace it under warranty for its entire 10 year Warranty period.

You might have to ask for someone higher up as some lower level agents are not aware of the contract for some reason and go based off their 30 day return policy."

I then contacted Amazon via their online customer chat and asked for a replacement. I was told the drive was out of my 30 day return period and that I would have to contact Samsung. Guess what? I copied and pasted the above response from Samsung in quotes and was given a return label and sent a replacement drive by the same online customer service representative! So, if you encounter the same problem, feel free to copy and paste the response I got. Now I anxiously await my replacement.

Update 11/4/16
I received my replacement a couple days later and it works just as great as the first drive I received. Fingers crossed that this one will last much longer. I didn't keep anything on the drive that was mission critical but if you are keeping important files on your flash drive, it's a good idea to make a backup copy on your computer or another drive just in case your Samsung USB drive dies on you.

Update 10/25/17
*It's been nearly a year since I've had this drive now and no issues whatsoever since I've gotten my replacement. I also noticed that they downgraded the warranty from 10 years to 5 years, but I'm leaving the 10 year warranty title alone for those who purchased this drive when the 10 year warranty was around.

[...] Thank you!

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Joey Joe Joe Jr. Shabadoo

Excellent, flexible solution.

Reviewed in the United States on April 12, 2017

Size: 128 GBVerified Purchase

It's amazing to me that it took until now for me to (1) know that these existed and (2) get one of them. Here are some things to keep in mind:

1. Flash drive storage is generally going to be less secure than other forms of storage, unless you know what you're doing. Avoid using these for confidential or sensitive information. But for storing and moving music and movies? They're perfect.
2. Manage your expectations in terms of speed. It's a tiny device that holds more information than your entire computer probably did in 2004. It might not copy stuff super fast, particularly if you're like me and still have a lot of USB 2.0 devices.
3. There wasn't a lanyard/string thing in the packaging for mine, so that little end-cap is attached by friction alone. You might invest in some of the little string things, or just roll the dice.
4. It was literally plug-and-use on both my phone and computer. Drivers were seamless and immediate -- but a word of warning for phones: my phone and tablet are both samsung products. I don't know if that's relevant or whatever, but I wanted to be upfront that I'm a bit of a samsung fanboy, apparently.
5. Unless you have some sort of an adapter, this will not plug into your ipad, iphone, ipod touch, etc. This is for devices that have either a USB-A connector (like on your computer), or for devices that have a micro-USB port.
6. It's aesthetically quite pleasing, in a brutalist / post-modern kind of way. I don't know if that matters to you, but I like that it's all hard edges, clean lines, and neutral shades.

That's about it from me. If you need some extra space or the ability to transfer files to and from your phone without installing any software that enables your computer to talk to your phone, this is a really solid option. It was not that long ago that this much flash storage was either impossible or cost upwards of 100 dollars.

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RedSoxRiot

Transfer speeds vary - not as good as claimed

Reviewed in the United States on November 24, 2016

Size: 128 GBVerified Purchase

Samsung 128 GB USB Flash Drive

This is a great little drive with a few small caveats. The design looks fine but it seems the designer favored function over form. Samsung used good materials while the shape of the drive is bit odd (in my personal opinion) -- of course, design is ultimately subjective.

The micro USB connector was able to connect to my Galaxy s7 without having to remove the case. It was instantly recognized without any hangups.

Transfer Rates:

The device claims to have transfer speeds "up to 130 MB/s" and so I tested this claim with CrystalDiskMark (CDM). I tested this drive and my current 32 GB Silicon Power flash drive (also purchased on Amazon) to see how close CrystalDiskMark and actual file transfers really are. In the image you see that the Silicon Power beats the Samsung every time the drives are read, but the Samsung is the clear winner when you write to the drives...or so it seems. I then tested both drives with 3 different file tests -- all the tests were done on the same USB 3.0 port with the same files, with the same file system format. As you can see, I tested both drives with NTSF and exFAT (I decided to skip FAT32).

The files I transferred were
1) a 10.9 GB .mkv movie file
2) folder with 16 .mkv video files, most of which were about 650 MB totaling 8.0 GB
3) folder containing 604 .mp3 files totaling 2.7 GB.

I formatted the drives between each transfer, ran no other unnecessary programs or processes than the transfer and copied the files from the same drive to ensure the cleanest test possible. After the test I found that the Silicon Power drive often outperformed the Samsung drive even though CrystalDiskMark specified something very different. According to CDM, the Silicon Power was often not even half as fast at writing files as the Samsung. The real world tests show the Samsung to be quite a bit slower when reading and writing files. In fact, when I was transferring the 10.9 GB video file to the Samsung on NTFS, the transfer would hang for nearly 2 minutes before it would complete.

I did three tests on each drive with each file and both file system formats for a total of 36 file transfer tests, averaging the three test results for the conclusion. With the Silicon Power I found the transfer times to be very consistent, often with a few seconds one another. With the Samsung, however, I found there were some tests which showed very different times (I admit, there may have been outside factors).

Conclusion – CrystalDiskMark is either completely useless software or the results you find with it don’t transfer to the real world all that well. Whatever the case, I’ll take real world application over a benchmark tool. It is my opinion, the Samsung 128 GB drive is nice and is still a great deal for $30 – 35. If we were to extrapolate these test results to the 128 GB Silicon Power USB drive, I would think that's the better deal. It just depends on how concerned (obsessed) you are with transfer speed and your need for a micro-USB connector.

My PC Specs:
- Windows 7 Pro 64-bit
- Core i7
- 32 GB RAM
- Samsung 500 GB Solid State Drive

Pros:
- Size is small
- Transfer speeds are OK (see review)
- Dual connectors are useful if you have a phone with a micro-USB connector
- Works well with my Samsung Galaxy s7
- Designed for function

Cons:
- No lanyard included with drive (you need one to avoid losing the cap)
- Other USB drive options which may be faster at reading/writing data

Notes: I copied all the CrystalDiskMark data into the image of the Excel spreadsheet to make comparison easier. I also marked the best times and read/write transfer rates in green and the two Samsung time "anomalies" in read. I posted an image of different USB drives and some other things for size comparison – the drive reviewed here is circled with the comparison drive in the bottom right hand corner.

I will update this review if I find any reliability problems with the Samsung. I have owned my Silicon Power drive for over a year and it's worked fine so far.

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Marcel

Fair price for a 32 GB flash drive

Reviewed in the United States on February 4, 2024

Size: 32GBVerified Purchase

Works very well. I bought mine at least 4 years ago and it still works as well as the day I bought it.

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JJ Braunius

Lots of memory, almost impossible to install on keychain ring.

Reviewed in the United States on July 10, 2016

Size: 128 GBVerified Purchase

I am mainly disappointed because this unit was supposed to be key chain mountable and the extra micro USB port was supposed to be a plus. Well, the micro USB port odesn't work on any of my phones or tablet, apparently you need real jailbroken Android with power on USB (not sure the exact lingo but needs to power the device via USB port) for this to be seen by the phone or tablet. In my case, none had it or were disabled by their respective manufacturers. So strike one here.
Strike two - no way you can stick this on a keychain without damaging it. It won't go into standard size keychain ring, had to go with a smaller and more maleable/ bendable piece and still that barely looped and did damage to the plastic removable cap. The way it is designed - Samsung didn't take into account the angle that the round keychain ring would try to approach the unit, and punched a hole to small to take into measurement the circumference of the oval ring. In other words, if you try a round ring it is almost impossible to install without scuffing the plastic. The plastic ended up taking damage due to the bad design so now it doesn't look so cool. If they made keychain rings square, I guess that would've worked :( Another downsize is that when you have to take it out of the keychain you will have to remove both the cap and the stick, on leave cap on the keychain, either way separating them and moving one around to release from the keychain is a chore.
The memory size is a big plus and thanks to that at least I won't have to carry drives with me - 128 gigs is enough for most jobs, so I guess that's the main reason why I am keeping it. Interesting idea for mounting but bad implementation by Samsung.

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Kindle Customer

Amazing.

Reviewed in the United States on August 7, 2016

Size: 128 GBVerified Purchase

This little thing is amazingly small and compact. So much that I am almost afraid of losing it. The metal design is great and very sturdy. I would prefer some kind of cap on the larger USB side if you are going to keep in in your pocket. I don't so it is not a big deal. I am impressed with the quality. It is well worth the money.

Only down side is my Droid Turbo (Verizon, Android 5.1) did not work with it right off the bat. I had to download a file manager app. Not the worst thing ever... it is actually a limitation of the operating system on my phone, not the flash drive. I only mention it here because I think people should know before buying these types of things. It is not specific to this device so anything you choose will still have this problem, atleast on Android 5.1.

One thing to keep in mind, according to my experience and research to try to get this working... the format of this device can be read by pretty much any operating system and is very universal. However, I want to transfer files (pictures and videos I took) off my phone and get them to my computer. This flash drive will work for that, but you have to reformat it to NTFS. Android can't write to any other drive format but it can read them. It is very easy to reformat to NTFS via any computer, only took about 20 seconds.

All in all I love this thing and would highly recommend it to anyone. Doesn't matter if you want to just read files from it or transfer to it. The capacity is amazing. I plan to fill it up with movies and use is on a transatlantic flight with my tablet.

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John

Compact, & Reliable

Reviewed in the United States on November 11, 2016

Size: 128 GBVerified Purchase

Decent read/write speeds, enough so that they didn't bother me. I've not got time to take pictures of it's results, but the fact that write times moved fast enough to resemble every other USB 3.0's speeds was enough for me here. More importantly, the micro-USB adapter was what interested me most. It's plug and play on either end, but the micro-USB may give you trouble on non-Samsung devices. Came right up on a Samsung Galaxy Tablet, but on an LG phone, I couldn't get it to work. Also comes with 119gb of free space so you have a precise figure going into your purchase decision. Overall, it's a great product that I use to this day and easily formats to exFAT or NTFS. The stick can get a little warm sometimes either from run times of it reading/writing in you machine, or also from just being near a laptop fan. However, I've never noticed it hot enough to burn me or cause damage to the disk. Again though, be aware that the micro-USB may not work with non-Samsung devices. I thought it could be conflicting with my micro-SD card in my LG device, but there's a micro-SD card in my Samsung tablet and it worked fine there. So other than that and getting slightly hot, it's a wonderful Flash Drive.

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Xavi Mac

Good flash drive, OTG became more novelty than useful feature for me

Reviewed in the United States on March 17, 2018

Size: 32GBVerified Purchase

Purchased this mainly due to curiosity. After all, here's the other flash drives I have: 2x 4GB and 1x 8GB, all USB 2.0. Oh, and there's one 128 MB one that I got when I was 8 years old (ca. 2006)... At the time, I think that cost ~$10 ($--.99 or something?).
So in October 2017, 20 year old me stumbles upon this (Samsung 32GB) for ... $14.50 *jaw drop*

I know, I know, I'm not "old", but wow, technology changes fast. I remember when I was younger thinking that 64GB was HUGE, but when I had noticed that one of my friends has a 1TB flash drive, I got curious and decided to look at the market (prices, capacities, etc.).

Needless to say, none of my other flash drives can do USB On-The-Go (OTG). So that's cool. But here's two potential downsides based on my experience:

(1) In January 2018, I upgraded my phone from a Moto X (micro USB connector) to a Nexus 6P (USB-C connector). In other words, I can't use this with my newer phone. There are other Android devices with which I can still use the OTG feature of this flash drive, but its main use has been "just a flash drive", albeit one that enables faster transfers between USB 3.0-capable laptop and desktop. Again, the decision to purchase this was driven at the time by "Yay, I have a phone that can do that :D" because the ability to transfer a file between my computer and smartphone without needing to worry about network stuff like wireless signal strength seemed practical and advantageous.

(2) This thing is small. (I guess that could also be a good thing, depending on you and your needs.) There's this part that juts out near the cap that has a hole for you to thread something through, but I haven't found a way for this to work for me. A few times, when I didn't want to lose this in my pockets, I would take the cap off and be able to fit the drive on a key ring. Obviously, this isn't the ideal: the cap is probably meant to stay on when the OTG/microUSB end is not in use.

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neneloco

Great flash drive

Reviewed in the United States on March 23, 2016

Size: 128 GBVerified Purchase

I really like this flash drive because of its capacity and cheap price ($35). I love that i can stick it in my laptop then straight to my cell phone.

I would like to give it 3.5 stars but i rounded up to 4 because 1 of the issues it not really Samsungs fault. By default, the file system on this drive is exFAT. It has to be because that's what my galaxy S5 can read. I learned this only after formatting it to NTFS, then having to go back to exFAT. My preference is NTFS and most devices (specifically bluray players and car stereo units) are compatible with NTFS and dont recognize exFAT. Luckily my home theater system is Samsung and so i can play my movies right off the drive but can't use it on my 2015 sony bluray even after a software update. NTFS works fine if you're using it strictly on computers.

Second issue was with the way the flash drive was designed. For convinience, they made a little edge on the drive which has a hole in order to use with a lanyard so as not to lose it. When the drive is inserted into the phone, that edge lines up on the right side. Thats great, but my Galaxy S5 has a charging port cover that opens to the right side and there lies the issue. Everytime i insert the drive in my phone, i have to pull and bend the port cover out of the way to the point that its going to break. I have a feeling ill have to replace the port cover soon, grind down the edge of the usb with a metal file, or stop using it in my phone which defeats the purpose. Perhaps the drive was made when the S4 was out, which has no charging port cover. If you can overlook those 2 trivial issues, you will love the drive.

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