Reviews SanDisk 128GB Ultra Fit USB 3.1 Flash Drive - SDCZ430-128G-G46

SanDisk 128GB Ultra Fit USB 3.1 Flash Drive - SDCZ430-128G-G46

Thanks to its compact design, you can plug in the SanDisk Ultra Fit USB 3.1 Flash Drive and leave it in, making it the simple way to add extra, high-speed storage to your device! It delivers write speeds that are up to 15x faster than with a standard USB 2.0 drive so you can move a full-length movie in less than 30 seconds. Plus it includes SanDisk Secure Access software for password protection and 128-bit encryption to keep your private files private.


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I wanted a larger flash drive for backing up my laptop, (not my only backup device). This was the largest capacity, but smallest size I could find. After it arrived, I ran the standard fake flash check, and this drive really was 256GB. Copying my laptop's OS image went smoothly, and faster than my old 32GB flash drive. But, that was USB 2 device...

A test boot and use found it to be both reliable, and fast enough in case something happens to my normal SSD. Even bringing up LibreOffice was quick, less than 5 seconds.

Note that I over-wrote the built-in FAT32 file system, as I use ZFS on Linux. This drive works just fine with alternate OSes & file systems. And my current laptop only has USB 3.0, (5Gbps), with slower processors, (dual core Celeron). So this flash drive would likely be faster on newer hardware.

Last, I knew this was not as fast as some of the smaller capacity flash drives. Check the specifications, and make sure you understand that before you buy.

So far, working flawlessly. Currently, this is the only 256 GB Fit size drive available that I am aware of. Read speeds, for normal everyday activities, are very good with acceptable write speeds. Very comparable to my Samsung Fit drives. Only complaint I have is the plastic casing instead of metal for which I deducted 1 star. Otherwise I am very happy with this drive and highly recommend it.

The first one I received did not work. Neither my Mac or PC would recognize the stupid thing. I literally spent 2 hours researching and resetting my smc, making sure in utilities the usb drives were there and then finally I gave up. Contacted amazon and got the new one today and works like a charm. Plug and play, didn't even have to format for Mac. Love the secure access vault (Kids are nosey you know)! At this point it's getting 5 stars because Amazon rocked in replacing it, and I'm just happy the the darn thing works. If it decides to not play nice I'll update my review.

This product is a pretty nice product for the price. I transfers at pretty decent speed from PC to USB but when it comes to USB to USB it can take some time but that also depends on the other drive. The product comes standard with just the USB thumb drive no lanyard/string to hold it, but if you have a key ring and string this would go great on your keys. It can store exactly all the stuff you need being 128 gb and it is very light weight and small. This made it ideal for me to have for my keys. I will say encrypting the USB drive is a must just to protect the data from being stolen or you lose your keys. It was very simple for me to put a key string on this USB compared to other usb thumb drive as it has a pretty big hole for the string to go through. The minor complaint I have which is going to be a given since the size of the thumb drive is really small is that the USB can get really hot over a short amount of time. It is too hot to the touch but you can notice it so I do not recommend keeping it plugged in for extended period of time. After you transfer, I would recommend unplugging it if it is not in use. Great product overall!

I ordered this flash drive to use in my truck as a storage device for mp3's. I had an older flash drive that wound up with some bad sectors and my music kept locking up in mid song. This drive works flawlessly and loads really fast. The USB port in my truck is in the console so I needed something small and this fits the bill. Shipping was very fast. I would recommend this drive to anyone looking for speed and something small in size.

As small as it can be made. Totally secure eyelet on it, not some little attachment that will break off. It does read at 130 MB/s as promised, wrote seq. at about 50 MB/sec.

This is a plastic case. Previous thumbs of this size were in metal cases, which always corrorded when worn around my neck. So the plastic will be good. But is sure gets hot!

CS
I bought this to allow for storage and backups of my new laptop. Having this much storage in such a small form factor allows me to keep the thumb drive plugged into my laptop without it getting caught on things or banged around. I was able to set my backup client to backup to a chosen folder on the drive and auto backup each day. Works great, I changed the default folder locations for my pictures, documents, and downloads to the thumb drive and all works perfectly. I am even installing some applications to it to save resources for higher priority applications.

If you need extra space in a small package this is the best way to go.

An Amazing DiskOnKey. I used the previews model with 128GB as an extension storage for my Dell XPS 12, it's always plugged in and doesn't interfere with my case and bag. I have waited for a 256GB variant for quite some time and as soon as I saw there's a new USB 3.1 256GB model I bought it. It's an amazing device for laptops, It works very fast. Read speeds are higher than the previews USB 3.0 model. Write speed is a bit higher. Worth every penny!

After having a few days to try this out, transferring over 100 Gbs of files onto it, I can honestly say that this is a solid product. Much better than the older Fit version. This one does not get scorching hot like the last version, and transfer speed are mostly fast with timely use. This could have been a 5 stars but for one reason, I have to give it 4 stars. It's understandable why the entire body is made from a plastic like material, because the last model tend to overheat and literally burned you. The plastic doesn't absorb as much heat, so temperatures stay mild. However, because its plastic, I worry about its durability. I've taken it off and on from my laptop to my desktop, and I can already see some ridges forming from scratches from taking it in and out the USB port. I few more of this, and the scratches could get deep enough that it could crack the Flash Drive. It's probably unlikely, but it still a cause of future concern.

It's slow and cheap and easily misplaced. The Ultra Flair is slower but a little bigger.

Here's a speed comparison to Extreme Go and Ultra Flair, two other sticks I have.

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Sandisk Extreme Go USB 3.1 Flash Drive 128GB - SDCZ800-128G-G46
59,665,642 Bytes/sec (477 Mbps)
3.7x faster than Ultra Fit
4.7x faster than Ultra Flair

robocopy "C:SteveImages2018" "d:temp" *.jpg *.mp4 /S /FFT /PURGE /XF *XXX*.*

Total Copied Skipped Mismatch FAILED Extras
Dirs : 13 13 0 0 0 0
Files : 527 524 3 0 0 0
Bytes : 2.626 g 2.623 g 2.59 m 0 0 0
Times : 0:00:50 0:00:47 0:00:00 0:00:03

Speed : 59,665,642 Bytes/sec. = 477 Mbps
Speed : 3414.095 MegaBytes/min.
Ended : Sunday, October 7, 2018 4:38:06 PM

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SanDisk 64GB Ultra Fit USB 3.1 Flash Drive - SDCZ430-064G-G46
16,007,541 Bytes/sec (128 Mbps)
20% faster than Ultra Flair
3.7x slower than Extreme Go

robocopy "C:SteveImages2018" "d:temp" *.jpg *.mp4 /S /FFT /PURGE /XF *XXX*.*

Total Copied Skipped Mismatch FAILED Extras
Dirs : 13 12 1 0 0 0
Files : 527 524 3 0 0 0
Bytes : 2.626 g 2.623 g 2.59 m 0 0 0
Times : 0:03:00 0:02:56 0:00:00 0:00:04

Speed : 16,007,541 Bytes/sec.
Speed : 915.958 MegaBytes/min.
Ended : Monday, October 8, 2018 1:40:39 PM

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SanDisk Ultra Flair 64GB USB 3.0 Flash Drive - SDCZ73-064G-G46
12,774,982 Bytes/sec (102 Mbps)
4.7x slower than Extreme Go
20% slower than Ultra Flair

robocopy "C:SteveImages2018" "d:temp" *.jpg *.mp4 /S /FFT /PURGE /XF *XXX*.*

Total Copied Skipped Mismatch FAILED Extras
Dirs : 13 13 0 0 0 0
Files : 527 524 3 0 0 0
Bytes : 2.626 g 2.623 g 2.59 m 0 0 0
Times : 0:03:45 0:03:40 0:00:00 0:00:05

Speed : 12,774,982 Bytes/sec.
Speed : 730.990 MegaBytes/min.
Ended : Sunday, October 7, 2018 5:55:54 PM

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