SW> Can you please add a option into the file base area's to be able to
 SW> choose the number of days files should be kept.
 SW> 
 SW> Ie:
 SW> 
 SW> Days Old: 0 (Default, keep all files).
 SW> Days Old: 90 (Delete files that are 90 day's old)

I will put this on the TO DO list.  In the meantime you can also delete the files yourself using your operating system based on their age and MUTIL's PackFileBases can remove them from your listings:

[PackFileBases]

    ; If true, MUTIL will check to make sure files exist, and will update
    ; file size in the listing, optionally removing missing files     ; (remove_missing)

    check_files = true

    ; If true, MUTIL will remove any files which do not exist from the file
    ; list database while checking integrity.  Otherwise they will be flagged
    ; OFFLINE in the file listing.  0 byte files are considered "missing"

    remove_missing = false

... This virus requires Microsoft Windows 3.x

--- Mystic BBS v1.12 A48 2022/04/03 (Windows/64)