So 0100b04011742000 is definitely the Title ID for MHR (US/World version).

The trailing usv0 work is not standard. Likely, someone appended usv0 as a custom tag (save version 0? US version 0?) and work as a working directory name.

Players use MHR Save Editor (PC) or MHRSaveEditor to modify:

A working folder named work could contain extracted save files (system, game_data.sav, etc.) before repacking.

If you're on PC emulator and encountering this error:

Yuzu:

Ryujinx:

For Monster Hunter Rise (US/World version):

If you are on PC (Steam), the string 0100b04011742000 is irrelevant; you should be looking in steamapps/common/MonsterHunterRise/ or the reframework folder for mods.