Drive space not matching after sync

[DrecksBongert]

Im doing a 1:1 backup of one of my drives over to a second, identical drive using FFS. The content is all simple media files, so no programs installed to that drive or any system related folders. i also checked for hidden drives, nothing there. yet after the sync, the destination drive has about 200 GB more data on it than the source drive (i made sure to format beforehand).
but the strange thing is, when i actually go in the two drives, mark all files and folders in root and check the combined amount, then the amount matches on both drives. its only when looking at the drives "from the outside" so to speak, when opening the file explorer that i get this discrepancy.

[therube]

What OS?
Tell us about your drives.

What is the size of all the marked files?
What is the size that Windows Explorer shows for each of the two drives?

[xCSxXenon]

Maybe:
https://freefilesync.org/faq.php#explorer-mismatch

[DrecksBongert]

latest windows 10
the drives are two 6TB seagate ironwolf drives, bought them new just recently.
heres a picture of the E:\ drive (source) having 200GB less than the F:\ drive (destination) but only when viewing the properties of the whole drive. when i enter the drive, hit select all and then look at the file size it shows the correct amount on both E:\ and F:\

[DrecksBongert]

Maybe:
https://freefilesync.org/faq.php#explorer-mismatch

i used the default filters and when disabling them the left over data amounted to a little over 20kb. same for the symlink.
its finishing without errors as well, so no issues there.
i checked and the longest paths, including files inside get to 215ish characters, close, but not quite. unless theres some deeply interleaved (is that the right word?) folders, which i doubt there are because the file structures usually dont go deeper than three folders.
and seeing how the contents do match but not whats displayed on the drive, as shown in my previous post, i guess ill just have to chalk it up to a bug...

[xCSxXenon]

Interesting... Next I would run Spacesniffer on both and compare the results

[DrecksBongert]

Interesting... Next I would run Spacesniffer on both and compare the results

i actually just used WinDirStat on both and found the culprit. theres an old 200 GB .iso left in the $RECYCLE.BIN folder, which doesnt appear when selecting to show hidden folders apparently. but shouldnt a simple format have cleared that all away? im pretty sure i did that, but maybe i didnt and i just manually deleted it. thanks anyways

[therube]

Properties of a drive, shows one thing
Properties of "all the items" on a drive, shows another thing (less then above)

Everything shows (presumably) everything (more then either of the above)

That all applies to size totals, & also file/directory counts.

In my case, best I can determine (& this is from Everything)
61,110,674,649 bytes, 121,530 files & 21,277 directories
(compare that to what the various Windows utilities give you)

If I "run as administrator" & check the Windows utilities, I can pick up more items, but still not all.

System Volume Information itself is taking up 4.33 GB, which is close to the difference between what Windows shows for E: vs. "all the files/directories" in E:.

(Interesting, not that I'd typically use the Windows Properties information.)


(I'd put my money on Everything.)
https://www.voidtools.com/


(In between the time I started, & before I actually posted, I see other posted.
Without that, was going to say, but there still has to be something else going on, on your end.)

[xCSxXenon]

Interesting... Next I would run Spacesniffer on both and compare the results

i actually just used WinDirStat on both and found the culprit. theres an old 200 GB .iso left in the $RECYCLE.BIN folder, which doesnt appear when selecting to show hidden folders apparently. but shouldnt a simple format have cleared that all away? im pretty sure i did that, but maybe i didnt and i just manually deleted it. thanks anyways

A format would delete that as well. Oh well, it's figured out!