deleting hand histories

I was wondering if I should delete hand histories after I have imported into poker tracker. My full tilt idle miner isnt really working and the support thought that maybe it was due to too many hand histories in my HH folder.. so do you have any use for the HH's after importing them or can I delete them?

You can delete them if you are sure you will never need to re-import them. Just always have a good backup of your PT DB.

Also, you could just let PT move them to an archive directory for you. I think all the Auto-Import windows have an option to move them after they are imported.