Runs slow and certain processes fail
I am trying to figure out why the MacBook Pro is running sluggish through many tasks and then some tasks it seems to be failing altogether. I tried to make a time machine onto a flash drive and canceled it after it running for 3 days and only being 2/3 of the way through. It's not my computer so I'm not sure when it began. I used First Aid and all the discs came back clean. Any advice?