Misunderstand with amount size storage Folder's name Documents in macbook pro M3.

I don't understand where my file more that browse use for count of amount in Document folder.

In Totals show size in Documents folder 15.36GB for overall. however i calculate Obviously in file browser then storage count in Documents size it just 11 to 12GB. So how many size more where? it's should have around 3GB more for enough

total size it count. Also in Trash i already remove. One more thing, In My Documents folder show Documents - Local!!!