Drive size larger than the sum of its files and folder (SQL Logs)

Hello,

I spinned a new Windows 2019 server to host a SQL Server 2016. I created 4 additional drives for specific functions such as Data, Backups, Logs, and System_DB drives.

I am experiencing an anomaly which I cannot explain. The drive for Logs is 1TB. I checked Drive properties along with WindirStats and I see that the Used space is 834GB, yes the sum of theF:\MSSQL\Data files (5 in total is 136GB. What am I missing here?

Yes, I have hidden and system files visible, could not find anything. I had shadowcopies which took 51GB. I have since cleaned those and limited Shadowcopies to 400MB.

Any ideas?