Slow external harddrive speed

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https://bbs.archlinux.org – Hi, as the title says, i've got a very slow (about 5-8MB/s)  harddrive speed for external drives (doesn't matter if connected over USB2.0 or 3.0)Internal i've got an ssd (for root and home, sda1/2) and an 2TB hdd for data (sdb1). If i copy something from sdb1 to my home-folder, all is fine, i get about 80MB/s, so the problem is really just for drives connected through USB (Copy things from sdb1 to sdc1).The last thing i changed was the scheduler for my ssd, but this doesn't affect the external drive:$ cat /sys/block/sdc/queue/scheduler noop deadline [cfq] The filesyst (HowTos)