Hard drive full with 200GB of used space that I can't find

All of a sudden I've run out of space. On my 250GB hard drive, 236GB is used up with only 13GB free.

I used Finder to find big files. Nothing significant.

I used tools like Disk Inventory X, OmniDiskSweeper and Purple Tree, but according to them I've only used up 40GB.

So somehow 200GB is used up, but I can't see where.

Time Machine isn't running (and never has). The disk has no partitions.

I scanned my drive with DaisyDisk, and as an administrator. (Instructions) I found 187GB in the hidden ".DocumentsRevisons-V100" folder. These are document versions which the OS autosaves (more info). It appears to be from documents primarily from the app Sketch.

Here's how I removed the files.

• Open Terminal
• Paste defaults write com.apple.finder AppleShowAllFiles YES (This makes all hidden files visible)
• Relaunch Finder. You can hold down "Option" and then right click Finder. Click Relaunch.
• Look within the folder Macintosh HD/.DocumentRevisions-V100/ (For me there were a number of underlining folders with lots of files within.)
• Delete the folders and files within.
• Empty the Trash
• In Terminal paste defaults write com.apple.finder AppleShowAllFiles NO . This makes hidden files hidden again.
• Relaunch Finder again. Click the System Apple top left, then "About this Mac" and then "Storage." Breathe a sigh of relief.

Here's some articles I referred to:

• https://medium.com/@thomasdegry/how-sketch-took-over-200gb-of-our-macbooks-cb7dd10c8163#.kb2yopebo
• http://osxdaily.com/2012/02/20/clear-versions-history-auto-save-cache-data-in-mac-os-x/
• https://dribbble.com/shots/2184593-Sketch-users-Free-up-some-space
• https://www.designernews.co/stories/50043-hard-drive-mysteriously-filling-up

I did it the old fashioned way and created a cron job.

`#!/usr/bin/env bash 
 export DIRECTORY="/.DocumentRevisions-V100/.cs/ChunkStorage"
 if [ -d "$DIRECTORY" ]; then
    # Delete file
    rm -rf /.DocumentRevisions-V100/.cs/ChunkStorage/*
 fi`

With a cron job to remove at noon.

crontab -e contents 0 12 * * * /bin/bash /SCRIPTS/remove_chunkstorage_sketch.sh