Hard drive space does not add up
My HD says I have 170GB free however after adding up the apps, audio, movies etc it says I have 50GB free...
MacBook Air, OS X Yosemite (10.10.1)
Re-index Macintosh HD.
Spotlight reindexing will take a while to finish.
System Preferences > Spotlight > Privacy
http://support.apple.com/kb/ht2409
If you don’t have Macintosh HD icon on the Desktop:
Finder > Preferences > Sidebar
Enable Hard disks under “Devices”.
About “Other”:
http://support.apple.com/en-us/HT202867
Try OmniDiskSweeper. This will give the storage size details of the items.
https://www.omnigroup.com/more
Select Macintosh HD and click “Sweep Selected Drive” at the bottom.
Delete the files yo don’t want to keep.
Be careful. Delete only the files that can be safely be deleted.