I have 2 of these (G-Technology 2TB G-DRIVE R-Series USB 3.1 Type-C mobile SSDs).
Copying or even accessing anything from either of these drives is agonizingly slow.
It will copy at about 15mb/sec for about 10 seconds and then the transfer rate goes to zero, and then a minute later will start up again. This start/stop behavior continues for the entire copy.
Interestingly, I can WRITE to the drives and it is pretty fast and does not slow. The problem is only with reading from them.
I have a Windows desktop (Core i7 w/8 gig of memory).
I have several other G-Tech EVO series external SSDs (normal USB connections, not type-C) and they are fine and fast. My G-tech spinner drives are also fast.
I use Windows Explorer, but also tried FastCopy and TeraCopy with the same results.
These are new drives and are doing this right out of the box.
(My original post said that just copying from one to the other was slow. This was wrong. It’s a bigger problem.)
Thanks for any help.