I have filled a backup drive with 1 terabyte and my computer is running very slow. what files are safe to delete to free up space?
what files are safe to put in the trash without messing up programs?
iMac, OS X Mavericks (10.9.2)
It would be wise to move your large libraries like your iPhoto, Aperture, Lightroom etc, iTunes, iMoves to an external HD. That will free up HD space. After you have relocated those libraries move the copies on the internal HD to the trash and empty the trash. This is the smartest and safest method. Apple explains how to move these libraries in:
iPhoto: How to move the Library to an EHD
iTunes: How to move the library to an EHD