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Is it usually the flash drive slowing things down?

post #1 of 7
Thread Starter 
Is it usually the fault of the flash drive itself, when you experience slowness? Often times I will need to transfer 1-3Gb files to my 16Gb USB flash drive. Well, this takes anywhere from 3-5 minutes. I noticed that the transfer rate is only about 3.6 megabytes per second. Well, that's what it says, at least. Of course that's going to take a while when you're transferring several gigs at a time.

But what I want to know is, is it usually the fault of the flash drive, or the USB 2.0 bus? How fast does the USB 2.0 bus really transfer files? In the real world, not theoretical. IIRC, theoretical on the 2.0 bus was something like 60 megabytes per second. Obviously I'm not getting anywhere near that. But those theoretical speeds are seldom ever reached. Then again, I did buy the cheapest 16Gb flash drive that newegg had at the time.
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post #2 of 7
Lower end flash drives are made with super cheap / super slow memory, thus why you can get several GB for only a couple $$

Usb 2.0 does ~ 35MB/s, the fastest I've gotten is ~32 - 33MB/s
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post #3 of 7
Thread Starter 
So basically its my cheap flash drives. Well I have a bunch of cheap 2Gb ones that are faster than the 16Gb one. They were like $2 each. Why would they be faster? They're cheap too.
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post #4 of 7
less space so they can use faster flash memory compared to larger amounts if its cheap they will use the cheapest they can i love my adata flash drive a 64gig thats usb3.0 can copy 50gigs to it in under 20mins.
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post #5 of 7
Quote:
Originally Posted by Bal3Wolf View Post

less space so they can use faster flash memory compared to larger amounts if its cheap they will use the cheapest they can

Highly doubtful that manufacturers use better memory for smaller drives. In fact, I remember reading somewhere that the really low capacity flash drives nowadays tend to just be higher capacity drives with a lot of bad sectors. As for why they're slow - TLC NAND paired with a not so good controller. With the smaller drives, the controllers have less space to address which makes for slightly better performance. Of course, another reason the OP's drives may have been so cheap might be due to the fact that they're leftover old stock in which case, the OP may have lucked out and gotten a drive with SLC or MLC NAND.

USB 2.0 tends to cap out at 30-40MB/s for large sequential writes. If you're dealing with lots of small files, expect to see writes under 10MB/s. USB 3.0 is a major improvement. I've seen close to 200MB/s sequential via CrystalDiskMark with a SanDisk Extreme 240GB SSD connected via USB3 to SATA3 cable adapter. As far as USB 3.0 flash drives, I really like the SanDisk Extreme series, too. Not the fastest when it comes to sequential performance but they appear to be more well rounded and actually have decent random 4K speeds. They're also much cheaper compared to the SSDs in USB thumb drive form factor.
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post #6 of 7
Thread Starter 
If it caps out at 30 or 40, then my 3.81 has to be related to my cheap Adata newegg special.
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post #7 of 7
Quote:
Originally Posted by PhotonFanatic View Post

If it caps out at 30 or 40, then my 3.81 has to be related to my cheap Adata newegg special.

probly right my adata 64gig usb3.0 on my front panel usb 2.0 transfering a 11gig file never droped below 35 it stayed in high 40s most of the time but at the end started to slow down.


i love this flashdrive got used alot when i used to take my wd live to my friends now it just sits lol.
http://www.amazon.com/gp/product/B005WV5LHO/ref=oh_details_o03_s00_i00?ie=UTF8&psc=1

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