USB transfer speeds

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USB transfer speeds

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Have people here seen really slow transfer speeds using the Synology NAS USB port? I saw elsewhere people complaining about it.

I recently experienced this problem and have been googling.
For years I had always done my DS218+ NAS backups over the LAN to a portable USB drive that I attached to my PC. But today, for a variety of reasons I plugged the portable USB drive into the NAS directly. Found I had to download and install "exfat access" to to the NAS make it work. Started the transfer and noted what seemed like a great high transfer rate. Thought, gee, this will probably be faster than I usually do it, over my gigabit LAN through my PC.
Hours later, I check on the transfer... and it's barely moving. Took 24 hours! Yikes.

So today I needed to do a new transfer. Hooked the same USB drive to my PC on the same gigabit ethernet network as the NAS. Started the transfer with from the NAS to the USB drive using robocopy on the PC... I'm seeing nearly 1 Gbps.

Anyone find a solution to speed up the NAS USB port?
 
Last edited:
I'm using an USB drive formatted as ext4, and realize full USB3 speeds.

Make sure your enclosure is Synology compatible.
Define compatible... it started at close to line rate and then dramatically slowed sometime later, taking about hours.
Just finished a similar transfer over ethernet with robocopy:
fatnas copy.png

-- post merged: --

I should say, small files may be part of the problem...
 
I don't think it's a "compatability" problem. There is a USB standard. And regardless, on Synology's compatibility page they say "data transfer rate are not guaranteed".
Frankly, there is a LONG internet trail of USB problems with Synology that I found with just a cursory look. It appears to be a system / driver issue with Synology maybe? I don't like linking to other forums but...

As I said, maybe it's a large number of small files issue. Or maybe something else that after a couple hours it slows down?
Have you tried a 1TB plus transfer of many smaller files?
 

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