USB 3.0 Transfer Extremely Slow

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NateBeast

Honorable
Jul 3, 2015
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I am transferring 3 folders with a 55GB total from my SSD to a USB 3.0 Western Digital external drive. I am using a USB 3.0 cable with a 3.0 port, but the transfer speeds are anywhere from 200KB/s to 8MB/s. Isn't it supposed to be faster? Thanks.

EDIT: Now the transfer is exactly frozen at 7.99KB/s.
http://imgur.com/a/bjk2O
 
Solution
InvalidError
If you are copying tons of tiny files, the transfer speed will take a massive hit from all the HDD head seeks. If you are managing large source trees, you may want to compress them with 7zip or other utility instead of copying the raw tree to avoid the file system performance hit.
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InvalidError

Titan
Moderator
May 18, 2007
23,815
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If you are copying tons of tiny files, the transfer speed will take a massive hit from all the HDD head seeks. If you are managing large source trees, you may want to compress them with 7zip or other utility instead of copying the raw tree to avoid the file system performance hit.
 
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Solution
InvalidError

InvalidError

Titan
Moderator
May 18, 2007
23,815
5,265
108,890
HDD seeks are HDD seeks regardless of read or write. When you write a small file, the OS updates the the file system data to create the new file, writes the file data and once the copy is completed, updates the file system to reflect that fact. To update the file system, the OS needs to read the records, modify them and write them back, so that in itself is already at least three head operations. All-inclusive, you may be looking at a dozen HDD seeks costing 10-15ms each (~200ms total) per 4KB file.

If the destination HDD is fragmented on top of that, things get even worse.
 
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