Downloading from memory card
I have Lexar USB 3 dual card reader. When I am downloading large number of RAW files from SD card the process is painfully slow. But if I only select a few at the time the download goes very fast. Is there somewhere a cache or RAM which needs to be allocated to the Copy and Paste command big enough to facilitate the fast download ? Or is the bottle neck somewhere else?? I am on W7 and I have 12 GB of RAM.