I want to free disk space.

Apple documentation about this says "When storage space is needed, only the files you recently opened are kept on your Mac".

Ok, so I have this 25GB file in my computer that I'm going move to the Documents folder and I'm wondering if it will really delete if from my computer once it has uploaded because I need more space to copy other projects into my computer.

"When storage space is needed" is pretty abstract to me, I wanted to know how this really works.

  • One thing's for sure: if you want to partition your drive, the purgeable space on your hard drive counts as "real" space. Meaning on a 100GB drive with 25GB of real storage and 25GB of purgeable space, the largest partition that can be added is 50GB, not 75GB. So if you're hoping to create more space to create a partition, this is not the right strategy (and I don't know what is). Commented Mar 3, 2017 at 23:12

1 Answer 1


“Your Mac keeps all of your recent files on your computer, but keeps your older ones only in iCloud, ready for you to download when you need them again”, Apple says.

So as long as you still have enough free space on your hard disk the files will stay there.

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