Second volume, 30.0 MB, of a split RAR archive with a numeric name that gives no clue about the device, board or file type inside.

Third volume of a multi-part RAR set, 23.8 MB, with a purely numeric name that reveals nothing about the device or contents.

First volume of a three-part RAR set, 30.0 MB, named only with a long numeric string, so the model and content type are unknown from the name alone.