Bat file to delete files only when younger files are present

Question

Our backup system creates .bak files everyday which we can use to restore files if we ever run into issues. If left alone these would fill up our storage so I found a batch

Answer 1

Here's an untested example script which should work as long as you don't have file names where [DESC] contains _, = or other problematic characters.

@Echo Off
SetLocal DisableDelayedExpansion
For /F "Delims==" %%A In ('Set _[ 2^>Nul') Do Set "%%A="
If /I Not "%CD%"=="C:\xxx\yyy" (Set "_[:]=T"
    PushD "C:\xxx\yyy" 2>Nul||Exit /B)
For /F "Tokens=1* Delims=_" %%A In ('Dir /B /O-N *_backup_*_*_*_*_*.bak'
) Do If Defined _[%%A] (Del /A /F "%%A_%%B") Else Set "_[%%A]=T"
If Defined _[:] PopD
EndLocal
Exit /B