1'st answer from izx > reason 2, that You can see in my photo. After 3 hours of copying files I copied 29,4GB from 38,7GB but ONLY 20460 from 69502 files. If there is a problem that deserves a bug report then there is one with estimating the real time.
At first system showed me 4 hours, then decreased to 2, the last hour lasted 110 minutes. Copying itself (this screenshot was taken on 2016 but from Ubuntu 12.04) is very reliable I'd say if only USB drive is reliable.
Slows down and hangs seem to be two different problems. My mashines never hang but "slow down" when copying thousands of different files. I found an interesting answer here: askubuntu. com/questions/ 122113/ copy-to- usb-memory- stick-really- slow
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1'st answer from izx > reason 2, that You can see in my photo. After 3 hours of copying files I copied 29,4GB from 38,7GB but ONLY 20460 from 69502 files. If there is a problem that deserves a bug report then there is one with estimating the real time.
At first system showed me 4 hours, then decreased to 2, the last hour lasted 110 minutes. Copying itself (this screenshot was taken on 2016 but from Ubuntu 12.04) is very reliable I'd say if only USB drive is reliable.