From your description of the problem, all of the operations are related to disk I/O, which is to write / read files. You can check your disk health first.
1. Launch Disk Utility, found within the /Applications/Utilities folder
2. Select the Mac hard drive from the left side menu and click on the “First Aid” tab
3. Click on “Verify Disk” in the lower right corner and let it run
You will find the window populating with messages about the drives health, messages that indicate things are fine appear in black, messages that indicate something is wrong appears in red.
02-11-2015 11:47 AM