Fire Emblem Three Houses -010055d009f78000- -1.... Now

Update to at least v1.2.0 (Cindered Shadows DLC) to ensure save structure is final.

For further help, visit the Fire Emblem subreddit’s save data recovery thread or the GBAtemp forums – search “010055D009F78000 -1” to find users with the exact same issue. Fire Emblem Three Houses -010055D009F78000- -1....

It looks like you're referencing the for Fire Emblem: Three Houses on Nintendo Switch ( 010055D009F78000 ) followed by what seems to be a placeholder or error ( -1.... ). Update to at least v1

: Generally offers high accuracy. Updates and DLC must be managed via the "Manage Title Updates" or "Manage DLC" menus by right-clicking the game title. Fire Emblem Three Houses -010055D009F78000- -1....