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Question: free space gobbled up - lost 100gb on SSD

I have a MBP running HS 10.13.1

500 gb SSD


my files, system, everything is approx 250 gb.

Using "what size" app worked out at 257gb.


However all of a sudden my free space went down to about 109 gb.


restarted.

ran disk utility from recovery partition.

ran onyx

did the trim command on Time Machine to free up space.


for a short while, free space went upto 220 gb

then later today went down to 109gb

currently its at 184gb



what is going on. ?

MacBook Pro with Retina display, macOS High Sierra (10.13)

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Nov 11, 2017 9:34 AM in response to Robin Bonathan In response to Robin Bonathan

I'm not sure why this happens. I had the same problem a few days ago and ran Disc Utility and found that my drive was corrupted. In the end all I could do was to wipe my drive, restart holding Option, Command, Shift and reinstall the whole macOS and then migrate all of my materials from my Time Machine. That seems to have solved the problem. At least it has for now. Support had no answers other than what I did.

Nov 11, 2017 9:34 AM

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Nov 11, 2017 9:40 AM in response to johnbear1952 In response to johnbear1952

Thanks


So far I am not seeing (or showing) any corruption in DU or onyx.


I think this only started a few days ago.


I had a very large trash which I only just deleted. Though I did get an error on trash later the same day and had to reboot to clear the last file in trash.


Using "whatsize" it shows all my files and confirms its at 257gb - Trash at zero.


But then says only 143gb free. So somethings up.

Nov 11, 2017 9:40 AM

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Nov 11, 2017 9:48 AM in response to Robin Bonathan In response to Robin Bonathan

There's no chance that you have Windows on your drive with Boot Camp is there? That happened to me when I tried Windows 10 with Boot Camp and I was them forced to reformat my drive and Strat all over again. I too have an SSD like you. I hate to say it the reformat and reinstall may be your only choice now.User uploaded file

Nov 11, 2017 9:48 AM

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Nov 11, 2017 11:21 AM in response to Old Toad In response to Old Toad

I dont think so.


I purged the snapshots with a terminal command. That did not make any difference.


Also I think I should be able to see snapshots when I use "what size" (?)


I run a continuous wifi Time Machine backup to a WD cloud mirror so they should never get veery large.

Nov 11, 2017 11:21 AM

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Nov 12, 2017 3:15 AM in response to Old Toad In response to Old Toad

Just wanted to update this.


I think it is something to do with local snapshots in the end.

Not sure why its doing local ones as computer has been on home network all the time.

Also according to apple documentation the disk free space should NOT include snapshots.


I redid the trim command asking for it to clear up a very large size and the snap shots were deleted.


I am back upto 218gb free again.

Not quite what I was at but a lot better.


thanks for help

Nov 12, 2017 3:15 AM

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Question: free space gobbled up - lost 100gb on SSD