new mint install drive full of .ecryptfs

I set up a laptop with linux mint cinnamon within the last two weeks, and while trying to install The Sims 4 today I got a message that the hard drive was out of space. I have installed nothing so far except for Steam, and tools to get The Sims 4 running. I see that 131gb is taken up by .ecryptfs and a web search turned up this thread however I used the utility that was suggested with the same result. Then OP says multiple reboots have cleared up the issue. I am on reboot 4 now with no such luck.

Is it safe to delete this? Is it something with timeshifted?