USB 3.0 Slow Speeds

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.

 

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?

 

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).

 

Looks normal to me for that amount of files and that size transfer. USB thumb drives, even USB 3.0 ones are dead slow for operations like this.