Is the speed advertised (280MB/sec read, 180MB/sec write) the sustained read/write rate, or is this a burstable rate that drops after a few seconds?
2086066
I don't know if I can answer in the way you are looking for. I can tell you I purchased this to run a Virtual Machine from it. That didn't work out very well. Too slow. I can tell you copying the VM to/from the drive is very fast. Fast enough that I kept the drive to keep a backup of my VM's with me. It does seem that the copy rate is consistent from the time it starts to the time it completes.
1911583
Yeah, this is seems common, they aren't exactly a "high speed sync" solution. 1/160 seems to be the best speed for reliability
1270123
Reads @ 19.5 Mb/s. Have not performed write test. Mostly use it for RasPi OS. Works well enough for that. Hope this helps.
76170
I have only used the product to install programs so far. I believe that the specs indicate a CDR write speed of 24x and a DVR write speed of 8x
1555558
I wrote a non-techie review of my 64g and 128g. I compared writing 37.3 gig of data - the San Disk disk took 5:55 minutes for the 64g and 5:50 for the 128g. The other 2 (not cheapies) took between 25 and 36 minites. All were done with the same source data on the same computer using the same USB3 port. They were all USB 3 drives. Not sure what the specs are, SanDisk has them on their website, but I can tell you it is faster than any of the others out there except maybe the Lexar and the price on those is much higher.
1786849
I'm getting just under 130MB/s read and write. It took under 2 hours to copy some files (around a TB) that took seven hours under USB 2.0.
1952349
Sandisk says "write speed up to 90 MB/s"I did some tests with my USB 3 Card Reader (sandisk brand) Wrote a 4gb file to it and averaged 75mb/s and even faster on smaller files.. PC: i7 2600k @ 4.2 Win 7 64bit
755441
I tried to update from the company but it didn't work either. But it still running fine at the writing speed roughly 80-90Mb/s. But don't know for some reason sometimes fail to write
1601569
You are correct (and previous answer is not). The drive interface is 6Gb/sec (that's gigabits per second), as it says on the label. This is the standard speed of Sata3. This translates to roughly 600MB/sec - plenty enough to carry the quoted 550 MB/ sec the drive is capable of.
950341
The write speed stays above 45MB/s but that will be more than ample for still photography especially. It's also plenty for HD video or still bursts coming from a DSLR if you are converting this to a full-size SD card.
1471440
Joe, I don't know the answer and I'm in Italy with a dongle internet connectionthat cuts out faster than I can google. I would look at SanDisk's own website and see the writing speed (and secondly the reading speed).They seem priced the same, and Amazon's spekc are sketchy.
1278225
I can check later when I take it offline. Right now the green disk access light is flashing rapidly indicating a lot of disk activity. In other words, it is currently recording some TV via my Snapstream / Beyond TV recording software. I'll get back to this maybe next week. I do know that it is 7200 RPM.
1255453
Is it normal, ya sort of :) Not real world results, but it gives you a number for comparison between other devices. Its sort of like car performance and fuel economy results, they are test track and not real world results if that makes any sense. 32gb is the unformatted size, so figure a loss on average of about 74 megabytes (MB) per GB for formatting, basically 32 x 74mb, is about 2.368 gigs, and 2.368 subtracted from 32 = 29.632 but close enough to your 29.71GB number. It may vary slightly on different devices like sticks, drives, etc, depending on what they need for overhead. As far as the speed tests, that really depends on the type of file you are reading or writing. Tiny files in short bursts will give you a different result than reading or writing a 5 or 10gb file. I think the stated 40 mb/s speed is an average of whatever mixture they test on these devices. The chances of hitting that speed is probably not going to happen. What you seem to be averaging is about 1 meg a second write and 2 megs a second read speed, so a 10 meg file would take 10 seconds to write and 5 seconds to read with the data that you used for testing. Hopefully that helps.
817425
If you are using an older machine that does not have USB 3.0 support the slower transfer rate can cause an issues such as this and there is no fix. If you are using a USB 3.0 port make sure your motherboard drivers and bois settings are up to date. After trying all this if the drive continues not to perform to your expectations I would exchange it for a different one.
1931461
These drives are kind of strange. It transfers off the drive at high speed (~20 MByte/sec) but only writes at ~2 MByte. So I think it's USB 2.0 but the internal flash management chip on the drive must be pretty inefficient so it can't keep up with the comm. speed when it's doing write operations. Delete operations are also really slow.So overall I probably wouldn't recommend this product. I got them because they were cheap and I don't need high performance for what I'm using them for.
1933828
The Micro SD card I received is only able to reach half of the purported 70 MB/s. The A1 SD benchmark app on my Samsung Galaxy S5 shows read performance at 35.35MB/s and write speeds of 20.33 MB/s. Running CrystalDiskMark 3.03b when mounting the micro SD card on Windows 7 x64 shows read performance at: 44.23 MB/s and read at: 17.93 MB/s.
893139
mine is around 44k read and between 16k and 20k write. The 8mb meaning you can potentially take 360 8mb photos per minute.