My HD is almost full-how to know which files are the most "upload" from my shared files so to delete only the files that are never uploaded from my computer.

In the "Library"-"Shared" in column "Uploads" for example i have 3/4
What is 3 and what is 4
Also what shows column "Hits" and for examle 32

Which number is the most usefull to know which file is the most "upload" from my computer?
Answer to this questin will give me chanse to continue seeding the best torrents from my shared files and to keep space for new dowloads.

Thank you!

LimeWire 4.14.8 /WindowsVista