I have a seagate expension 1tb usb 3.0. When I use it in my gaming computer the transfer stop randomly and slowly transfers. Take 30mins to transfer 10gb. As well I can't use any programs, its like if windows is giving all its resources for the file transfer.
You should remember that the data is transferred to the destination, only as fast it is being read off the source.
USB 2.0 has a maximum theoretical speed limit of 60 MB/s. Actually, it is only today, several years after the launch of USB 2, that USB 2 devices are able to fully exploit this speed (even then, there are not too many which can do this). Most of the USB 2 devices today max out at 30-35 MB/s. I've already given the reason for this, the read-write speeds of devices bottlenecks the transfer process.
So for USB 3, don't expect speeds of 400 MB/s +; since even though the data could be transferred at that rate, it cannot be read off the source HDD or written to the external drive at the same rate. Now if you were to hook up a superfast SSD to the dock, & also had a similar speed SSD in your system, then the transfer process would be definitely faster, since both drives could read & write lighteningly fast.
So it is more likely that the transfers you are doing are bottlenecked by the storage drives, in particularl, their sequential read/write speeds; not due to the fault of USB 3.
its starts out very fast then it stops. the speed drops down, I have a 128 gb ssd intel and a 2tb 7200 rpm western digital black.
Its annoying that i can't run anything until the files are transfer which takes to long to do. It writes at 80 megs a sec.
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