Hi!
Sorry I'm late.
OK, so you have the Gen2 linker. What you need to do is rename your .Sav file to SRAM.Sav and drag it to the BennVenn drive that comes up in MyComputer. It'll show you the standard copying bar thingy and after around 4-5 seconds it will disappear. And you're done! Restart your gameboy and your save file will be there.
My linker only acknowledges filenames called SRAM.Sav (There were a few reasons for this, Windows or any OS for that matter doesn't write files to a Devices file allocation table (FAT) individually. It reads the current whole FAT, modifies it, then re-writes it in one block. There was no easy way to discover the new filename without allocating resources to backing up, comparing etc.. Having it overwrite the original file means my FAT directs windows where to put the file, where it is intercepted and routed to the gameboy via the link cable)
So as I said, prepare your filename to be copied by renaming it to SRAM.Sav then drag it over. Getting it back is the same, Drag it off and rename it to whatever you like.