Reviews SanDisk Ultra Fit 128GB USB 3.0 Flash Drive - SDCZ43-128G-GAM46

SanDisk Ultra Fit 128GB USB 3.0 Flash Drive - SDCZ43-128G-GAM46

This ultra‐small, low‐profile USB 3.0 drive stays put for extra storage or moves media super‐fast between devices. Now you can transfer a full‐length movie in less than 30 seconds, enjoy write speeds up to 15 times faster than standard USB 2.0 drives and count on ever‐present storage that is designed to stay put.

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I'm slightly perplexed by the plethora of negative reviews here. I rarely post reviews, but the recurring theme that this product dangerously overheats had me worried, and I almost passed on Amazon's ridiculous sale price in favor of the Samsung Fit (which was considerably more expensive at the time). The short version: I haven't had any of the problems described by others. Does the Ultra Fit get warm? Yes. It's really freaking small. Does it get hot enough to burn you? No way, at least the one I received hasn't. When it first arrived in the mail, I immediately transferred 50+ gigabytes on it via USB 3.0 . I immediately pulled it out of the port, fully expecting it to be smoking based off all of the negative reviews here. It was warm - not hot - and it was no where close enough to actually burn my finger. Luckily, other websites have compared this model to similar products on the market by Samsung, Transcend, Lexar, and PNY, and the increase of warmth is prevalent with them all. If you see any statistics between this and the Samsung model for instance, you'll find there is only a few degrees difference between the two while running similar tests. I'm not sure where the negative perception lies. Perhaps the Samsung model hides it better from one's touch because no metal (a better conductor of heat) is sticking out of the USB port, only the white plastic nub. The Sandisk Ultra Fit sticks out about the same amount, but the plastic piece is considerably smaller and the metal casing is slightly exposed (as you can tell from other uploaded pictures). This is probably where one 'feels' the heat.

There's not much else to say here. The Ultra Fit is crazy small, and I leave it plugged into my laptop just about all the time. Read/Write speeds aren't the fastest, and they decrease (as others have noted) during large file transfers, but this isn't much of a problem for me. I seldom transfer large files, preferring to use it mainly for storage expansion (for media files) and as an automatic file backup. For the current $25.99 asking price, I consider it an amazing deal. I'm glad I took a chance on it. I have other Sandisk products, and they've all held up extremely well.

I really appreciate this thing's compact size. I haven't been able to get full USB 3.0 speeds, but nothing really does. I managed to get a throughput on it of up to 40 Megabytes a second, which is much faster than most other flash drives I have bought in the past.

It arrived formatted to FAT32, FYI, I haven't tested reformatting to either EXT3/4 or NTFS. For the most part, FAT32 works for me -- has highest level of cross-computer OS compatibility... despite EXT3/4 being open source, go figure.

I'll follow up if I wind up reformatting to use it as a portable OS -- likely Linux Mint, Lubuntu or Kubuntu Laptop Remix -- Windows uses flash RAM as system RAM way too much, and that burns out flash RAM pretty quickly.

The only drawback I found with this device is that even though it's smaller than the tip of my thumb, it holds more information than I've written in my entire life, even including my schoolwork, and can load that amount of information in under 15 minutes. Kinda makes my 30 years as a part time writer feel ultimately negligible. The price of technology, right?

Highly recommend this, despite my esoteric crisis of apprehension regarding quantitative substantiation of my life.

Works perfectly as expasion drive space for Ninetendo Wii U -- dropped it in, formatted it via the Wii U, and copied data right over. The Wii U complains that it may be slower -- but as far as I can tell Super Smash Bros loads and plays just as well as local storage.

Also -- it does not block the other usb port while inserted.

I bought the 128GB capacity with the prime deal and I am really satisfied with the price and fast delivery.

I bought the disk to expand my available disk space and have the convenience of USB. Both physical and capacity size are impressive. The available space on my disk after formatting to OS X Extended is about 124.00GB on my MacBook Air with OS X 10.11.5 (El Captain).

The disk comes with SanDiskSecureAccess for windows and a manual to set it up. Mac users have to download software but there is a guide for those users as well. After that, you can set a password to protect the files and delete them safely (Note that you should install it on the disk).

To test the speed, I used Xbench with different scenarios. Here are the results:

Sequential 99.42
Uncached Write 134.26 82.44 MB/sec [4K blocks]
Uncached Write 68.42 38.71 MB/sec [256K blocks]
Uncached Read 69.29 20.28 MB/sec [4K blocks]
Uncached Read 267.58 134.48 MB/sec [256K blocks]
Random 58.90
Uncached Write 18.40 1.95 MB/sec [4K blocks]
Uncached Write 146.38 46.86 MB/sec [256K blocks]
Uncached Read 337.10 2.39 MB/sec [4K blocks]
Uncached Read 265.21 49.21 MB/sec [256K blocks]

which are really great numbers (the speeds are the numbers with MB/sec).' But to have a feeling for the real tasks, I copied a bit more than 13GB of movies to the disk. Unfortunately, the speed on USB3 was fluctuating a lot and at some points, it was really slow.

About the heat problem: The drive got warm but it was not unusually warm, so I would say the heat was normal for a USB disk and nothing to worry about.

Very small physical size, great for carrying around in pocket (almost too small and easy to lose)
Decent throughput
Perfect for laptop - when in place nothing to breakoff (have done this a couple times with 'traditional' usb sticks when moving laptop around)

(very minor) the cover is sometimes very hard to take off
(MAJOR) this drive heats up greatly when under heavy use. To the point that you cannot hold it.

Great small size and decently fast using USB 3.0. Wouldn't recommend having this in use (read/writes) for long time because of the heat problems. I mainly use it for transferring/backing up files. If I have a lot of data to transfer I do it in batches and remove the drive in between or use a 'stick' USB drive. (this drive is so small that it has a hard time dissipating heat) I have several of these and use them almost daily and love the convenience of the small size.

I am very happy with this purchase. I use my computer for work daily and like to save my reports and pictures to an external drive instead of my laptop. Up until now i have been using a SD card in the reader slot that i leave in all the time. While it causes some inconvenience with fitting into a bag the big problem is that the SD card is not very sturdy and i have been afraid for some time now of breaking it and loosing data I have yet to back up. Regular flash drives are simply to big to leave in all the time.

Not this product! I was pleasantly surprised by how low profile it was once plugged in. Some of the other reviews indicated it may stick out a bit further, may be a difference in computers, as mine is fairly close. I have included a picture with the SD card in to show the difference between the two. Now my laptop slips right into my bag without problem.

The big complaint with these micro flash drives it heat. As I said I transfer data files, a word doc/ pdf, and maybe 50 pics or so on average at a time. Not exactly 60gb worth of data. I think at the end of the day the reality is if you plan on transferring huge loads of files at once you will be better off using a full size flash drive. These simply do not have enough surface area/ air flow to remain cool. I have had no issue with heat even when I did a few GB initial dump of some files onto the drive. It was certainly warm to the touch when removed but no where close to concerning. I am sure if transferring for longer amounts of time that would change.

Bottom line is if you need a small drive that you can even leave in all the time to keep files on this will work perfectly. I can't help but to think how nice this would have been in high school to have avoided carrying around floppy disks!

I originally purchased this for holding video content and had it plugged into my Fire TV Box but, I just upgraded to a 1TB external hard drive, so this will now be loaded with music and plugged into my audio receiver and it will only be used to play music occasionally. It's really perfect for that because of it's low profile since the USB port on my Onkyo receiver is in the front. I'm able to keep a backup copy of 7 seasons of Game of Thrones on it and still have room for a little over 17 GB of music. Works for me.

My laptop is an older model so, it's only got the 2.0 USB ports, I'm getting transfer speeds peaking out at right around 30 MB/s, it gets just above that at times but, I'd say the average rate is somewhere between 20-25 MB/s when copying files to it. I have to agree with the other reviewers who have said this thing gets really hot, after moving a few GB's of files around with it, (to and from), just before writing this review, it was hot enough that I'm sure it would burn someone with more sensitive skin. I can only imagine how hot it might get if I had 3.0 ports and it was able to hit higher speeds. When I removed it from my Fire TV is was hot and I hadn't even been reading any files from it, I was using the box but, I would think I'd have to be reading from this specifically for it to be getting hot at least. Really makes me wonder how long it'll last with overheating issues like that. We'll see how it goes. I don't believe I'll have the same issues with it warming up when not in use once I plug it into my audio receiver so, hopefully I don't have to worry about it failing anytime soon, I'll be sure to update my review if it fails in an unreasonable amount of time.

Overall, I think my recommendation of this product would have to be reliant on what you want to use it for. If you just want to fill it up and set it aside as a backup or do with it what I'm doing now, I believe it'll be good for that. If you want something for large video files, and plan to play those files fairly often, I'm not so sure this is the thing for you because I don't trust the heating up issue. Before I bought two 128 GB flash drives, (this one and a SanDisk Cruzer), I wish I had looked more into the external hard drives. Most of them now are flash drive, so they're compatible for use with a smart TV or a Fire TV Box, etc., (if that's what you're using a drive for), and you can get one with a lot of space for a pretty reasonable price. They're also pretty compact, which is convenient. :^)

After some shopping around I purchased this drive in the 32gb version. I was worried about the heat situation that so many seem to have complained about. When I received this, I checked first to see what software was installed on it. The usual security software which I don't need to use. I didn't even format the drive. My reason for purchase was to load it up with music so I can pop it in the usb drive in my car. Well, after loading 17gb of music on it in one shot I can report that I didn't have any heat issues at all. Warm yes, but not hot. 17gb of music took 35 minutes to load, not the fastest, but not too bad. I previously loaded the same music on a usb 2.0 drive and it took around 90 minutes.So, this one was roughly 3 times as fast, not the up to 15 times faster as advertised. Overall satisfied because now it's all about the read function from the car audio system. The drive works flawlessly in the car. My reason for buying this drive was to have a very small drive that didn't get knocked around in the console where it now lives.

For reference concerning the comments here: All flash drives get hot and this one doesn't get nearly as hot as others do. The Ultra Fit also out performs others. I would not listen to what people who have no idea what they're doing have to say. If you abuse a flash drive you will obviously cause it to heat up or become corrupt. I have abused this drive for a very long time and I have not had issues before. I also own a plethora of flash drives, I consider the SanDisk Ultra Fit the best. It has better functionality and performance than others. I use it on a lap top for work. I changed all the directories such as Pictures, Desktop, Videos, Downloads, etc to folders on this drive. So, this drive actually contains all personal files on my computer. It acts as an internal drive for me. It has never failed doing this and has never become hot doing this. I have also abused it by adding a large amount of files on it randomly from different directories simultaneously. That is where it becomes hot but it still performs well. If you have speed issues when doing something like this, cancel and transfer files like a normal person. No flash drive likes being abused that way.

I have a car with a USB socket in which I keep a small micro card reader, with a card in it, with all my music. Though it was small and relatively short, it always bothered me that it stuck out and I worried about hitting it with something I threw in the console. Not with this!!! It just barely sticks out enough to be able to grab it and get it out. No more worries about hitting something. I'm sure the same would apply if you often use a laptop and various USB drives. If you need the space, or just don't like another type of USB sticking out, this is a highly recommended choice. Reads fast, great capacity, and SMALL!!

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