The folder and files sizes are different... what did I miss?

[nathannew2009]

Hi.
Returning user to the software. Used version 4 many years ago and it did wonders removing hundreds of duplicate images... without reporting the source at the same time and subsequently deleting all of the images. So glad I found it.
Today, I'm going again with version 5, after many more GB of images taken, copied, pasted, moved, cut and copied again.
I have a confusion. I have pointed the software at C:\Users\*myusername*\OneDrive\Pictures. Windows (right click and properties) tells me this is Size 266GB, On Disk, 267GB, 40860 Files, 577 Folders but the software says it is scanning 122GB, 38324 Files, 578 Folders (File type chart backs this up).
I think the extra folder is the Pictures folder itself, so that's fine. What or where is the unscanned data and why?

Any help appreciated.

At the time of writing i've just thought it may be videos, within the pictures folder. Though this seems excessive I think... could it be that?

[DigitalVolcano]

It's possible that it is skipping hidden folders or junctions. Check for a warning message in the scanning process, and check the log file for the scan.