OS X 10.11.6 Missing over 200GB of disk space I have a problem with disk space - all programs report that I used up 470GB out of 512GB, but all my files take about 245GB. Storage tab in "About this Mac" reports this space as "other".
Where is the missing space?

This is a Mid 2014 MBP with built-in SSD running OS X 10.11.6. 

I tried already without success:


Repair disk permissions
restarting :)
Cleaning Spotlight cache
Removing small files that resulted in many inodes
Checking SDD health (is ok)


Grand Perspecive shows this space in gray and describes it as "Miscellanous used space" - what is this?


Daisy Disk and Path Finder reports 470GB used, whereas the sum of all folders is 245.3GB:



And here is the output of df -h:

$ df -h
Filesystem      Size   Used  Avail Capacity   iused    ifree %iused  Mounted on
/dev/disk1     465Gi  438Gi   26Gi    95% 114982849  6860861   94%   /
devfs          334Ki  334Ki    0Bi   100%      1156        0  100%   /dev
map -hosts       0Bi    0Bi    0Bi   100%         0        0  100%   /net
map auto_home    0Bi    0Bi    0Bi   100%         0        0  100%   /home
/dev/disk3     931Gi  605Gi  326Gi    66% 158652305 85363725   65%   /Volumes/Toshiba Backup


Maybe a related question: Missing hard disk space
Ok, I found it. Some time ago, I replaced my backup drive and the latest old backup from the previous drive seems to still reside on my disk. The old backup image was hiding under /Volumes/name-of-old-drive/. I could delete it safely with: sudo tmutil delete /Volumes/name-of-old-drive/Backups.backupdb/name-of-my-mac/YYYY-MM-DD-HHMMSS. 

To make sure that you do not delete any current backup, I recommend to temporary eject the currently used backup drive.

That was not easy to find, so I hope some other people will find this answer if experiencing similar problems.