Hi,
I was trying to have Kodi ignore .dat files (using Kodi 21.1 , smb:// sources here, on Android 11) , and failed. What I tried in advanced settings:
1.
<videoextensions>
<remove>.dat|.rar|.zip|.nfo</remove>
</videoextensions>
2.
<excludefromlisting> <!– Regular expressions that if evaluated to true won’t be displayed in Files View –>
<regexp>.dat</regexp>
</excludefromlisting>
<excludefromscan> <!– Regular expressions that if evaluated to true won’t be displayed in Files View ^.*.dat.*$ –>
<regexp>.dat</regexp>
</excludefromscan>
Content is set to mach movie path name . in that path there are both mkv and dat files.
Both seem not to work 
Movie library shows also the *.dat files entries
Any hint on the correct way?