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USB 3.0 Slow Speeds

loon3y

macrumors 65816
Original poster
Oct 21, 2011
1,224
123
My USB 3.0 Flash Drive is crawling on my rMBP.


anyone know why?






this is the USB Flash Drive

https://www.pny.com/Turbo_3_0_Attache_2_USB_Flash_Drive?sku=P-FD32GTBAT2-GE



is it because I'm using ExFat instead of FAT32? (which the results were based on)
 

soupcan

macrumors 6502a
Nov 21, 2014
725
2,926
Netherlands
It depends on the kind of files you're trying to copy. Single large files are no problem but as soon as you have a LOT (and I do mean a LOT) of tiny files it slows to a crawl. You can't do anything about that, that's just how non-volatile memory works.

Or it could be a bad USB chip.
 
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totten76

macrumors regular
Mar 12, 2015
220
6
10 gigs is a lot of data for a USB flash drive. Some sticks that are cheaper are just slower. I like to transfer files in 3-5 smaller increments instead of one big one. I feel like it goes quicker but who knows?
 
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yjchua95

macrumors 604
Apr 23, 2011
6,725
231
GVA, KUL, MEL (current), ZQN
My USB 3.0 Flash Drive is crawling on my rMBP.


anyone know why?






this is the USB Flash Drive

https://www.pny.com/Turbo_3_0_Attache_2_USB_Flash_Drive?sku=P-FD32GTBAT2-GE



is it because I'm using ExFat instead of FAT32? (which the results were based on)
Flash drives almost always tend to have bad performance, because:
1. They don't support UASP. BOT is just crap for random I/O.
2. Cheap NAND.

You'd only see pretty good speeds with something like a Kingston HyperX (and even so, only in sequential performance).
 
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snaky69

macrumors 603
Mar 14, 2008
5,904
484
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