Hey everyone, sorry for bumping this one up, but I am in the need of actually converting about 200 embedded blocks into linked ones.
I imagine that if you have a file with all the blocks you wish to link inserted, then its just a matter of matching names:
You could select all your 200 embedded blocks on your current file, and when asked which file to obtain the linked blocks from, this file should have the same blocks from your original file, with the exact same name.