Archive of 268 KB for the Dell Latitude E5450 on Compal board LA-A903P, tagged with CD3301, the TI USB-C/Thunderbolt power controller name the title mentions. The LA- numbering is Compal's, the ODM for this Latitude. Small packages labelled this way usually hold firmware for that chip, but open it to verify the exact contents. If reprogramming, read and save the original chip first and make sure the image matches the device capacity and board number.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @fixtronix. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)