I transfer a lot of files from my HD to USB drives. I use both USB 3 and 2 drives, but speed seems to be about the same for each. Transfers start out at about 34 MB/sec but by the time the transfer is about half done, it has slowed to about 17 MB/sec. Then, the last "about 5 secs" take between 1-2 minutes. Anyone know what causes this? Is there a fix?
I see all of the above except the becoming fast again. When the file transfer gets down to "about 5 secs", it will take between 30 secs for a small file to complete copying, to almost 2 minutes for a large file to finish.
File transfer rate can vary with the file size. Many smaller files can take longer than one large contiguous file.