Can't fast-fwd through very long files
350782
I bought this Soundfly SD WMA/MP3 Player Car FM Transmitter for the purpose of listening to long audio-books.  Many audio-book mp3 files are longer than 3 hours (they can be 6 or 7 hours).  Sometimes I listen to an audio-book in my car, other times while I'm walking (with a personal mp3 player), which means that I need to be able to fast-forward through hours of a file.  The Soundfly device seems unable to fast-forward past 1 or 2 hours into a long file.  I've tried FFWD at 40x and 60x, but it always returns to the start of the file before I can reach the point I want to listen to.  I've also tried playing the file before that point, yet it still returns to the start.  No matter what I do, the file reaches a certain point (1 to 3 hours in) and then returns to the start of the file.

I called Satechi customer support, and they said there's no solution to this problem.  I emailed their support team, just in case.  But buyer beware:  This device is great for music and short files.  If you want to listen to long audio files, then remember that you won't be able to fast-forward.  You can bookmark your time, or you can divide your audio-books into smaller files, but you can't fast-forward.
273966
Very slow response when installing major files and also when retrieving files from it. If they are small in size its ok but large files cause it to move very slow.
687671
I tried this with a speedy ssd that i removed from a pc thinking it would be a cool addon for my laptop, but was extremely disappointed to find that the throughput I was getting was dog slow at usb 2 speeds. Sending it back.
3994964
After installing this, my laptop slowed to a near-crawl.  I planned to use it to manually back up my documents once a week or so, but the "always on" nature of the software just used too much memory for me to keep the drive installed.  Even with the drive turned off, it would "backup," really just slowing me down.  I've un-installed the software, and will probably just do manual back-ups when I can.
1339436
I had read the review for this before buying it and was duly warned about how slow this drive is, but I took a chance anyway. Definitely a good size, especially for the capacity. However, it is slow to transfer files, even with folders on the drive.
It took me 16 straight hours of transferring files to move 4500 items (on average of 50KB each, so not even hi res pix!) from my hard drive to this jump drive.
But at least I can move some non-essential files off my desktop now. It just takes a bit of patience is all.
2108049
This drive is essentially worthless for anything other than copying large movie files.  If you need to transfer a few thousand, let alone tens of thousands of, small files be prepared for write speeds measured in double-digit KB, not MBps but KBps.  Makes this drive less useful than a steaming pile of BS.
3029868
One of the reasons I purchased this was because of the advertised speed. After receiving it I immediately ran it through some benchmarks. Regardless of file size, it writes at about 25-30MB/s and reads at about 40MB/s. This is considerably slower than I had hoped for.

If you are looking for a drive that is very fast, I suggest looking into the SanDisk Extreme 16GB USB 3.0 Flash Drive With Speed Up To 190MB/s- SDCZ80-016G-G46

But at a little over half the price of the Sandisk, I can't be very disappointed.
2091179
What a load of bull. There's clearly some buffer that makes it appear to write fast (60MB/s) for the first ~10 seconds. Then it goes down to 10MB/s. Slower than USB2. Avoiding Sandisk from now on.
3677657
I bought this drive for a local back of my files. Unfortunate it constantly dismounts and disrupts the backups. Not suitable for my intended purpose - backup.
2313642
This brand will not support formatting to NTFS.  Only FAT32 is supported and that has a file size limit.
103890
Bought this hoping to replace an existing drive and add some speed, however I get max 8Mb/s and between 3-6Mb/s regularly reliable device but slow.
3426535
"3.0" speed takes several minutes to load my TIFF files. Get what you pay for I guess
1990376
As others have reported, it's a great price (or was at the time of purchase) for 4TB RAID.  The problem is that getting your files off is painfully slow.  What's the point of putting a gigabit card in the device if you are never going to get data off of it faster than at 10-15mbps?

Boo to Western Digital on this one!
2552582
The DataTraveler 410 is supposed to be a major step forward in USB flash drive speeds, exceeding 20MB/s write speed.  If that is true, and I'll give Kingston the benefit of the doubt, then they have taken one major step backwards in quality control and I got a lemon.  This flash drive is the slowest I've owned in years.  I love Kingston, I exclusively use Kingston RAM and I own multiple Kingston flash drives.  The fastest of those drives is my DataTraveler HyperX which writes at a steady 18MB/s and reads at 30MB/s.  When I opened up the DataTraveler 410 the first thing I did was test it by transferring large video files and I was aghast when I saw the write speed max out at 8MB/s.  That is not a typo, it maxed out at eight megabytes per second.  I tried formatting with FAT32 and NTFS, with various allocation sizes, and nothing speeded it up.  I also tried multiple computers, enabling write caching, and a host of other solutions (including using TeraCopy instead of the default Windows file copier) to no avail.  In every test I did the HyperX maintained 18MB/s and the 410 got 8MB/s.  I'm hoping I simply got a fluke and that their new flagship USB flashdrive isn't a major flop.  I will be returning this drive for a replacement soon, one which I hope performs up to Kingston's usual standards.
4557282
This drive is crazy fast.

Actual size: 59.6GB (NTFS, 4MB allocated unit size),

Supported format: NTFS & exFAT (default)

USB 3.0 speed: Sequential Read & Write = 220.4MB/s & 173.4MB/s

USB 3.0 speed: Sequential Read & Write = 33.92MB/s & 29.32MB/s

A highly recommended buy!!!
377571
Works well but will take some time to copy all your files.
1212216
Ugggh. Don't buy this if speed is what you are looking for. I was moving up from a 64GB Extreme to this guy. It took about 10 hours to copy my 57GB of data from an SSD (I first copied the data from my 64GB Extreme to my SSD so I wouldn't saturate the USB channel) to this drive over USB3.0. The drive is fast copying a single large file (write times around 35MB/s), but it slows down to a crawl (sub 1MB/s) when doing lots of small files. I benchmarked this guy against the 64GB Extreme and it performed very poorly. Even reading was much slower. I am quite disappointed as I guess I was expecting comparable performance to my 2 year old drive, what with the advances of technology. Go for the 128GB Extreme drive; I wish I did.