VM is in external storage, used drag and drop and it filled up my HD

i have a parallels desktop VM in an external SSD. I`ll go step by step what I did and the issue I am having:
1) did a clean windows install and also installed Steam, and Assetto Corsa game too.
2) Once it ended, began transfer some mods and game content (on other external HDD) like tracks and maps to my new VM. I did by drag and drop from the Finder window directly into the VM with the Explorer window opened.
3) It began copying, but my Mac internal SSD filled up and now I can't find where all this storage is.

 

Screenshot, which is the https://kb.parallels.com/en/10117 error.
The resolution had no effect.
Below is the disk space. it is pretty low, it was in the 150gb range