same problem as OP.
Had to reformat my SD Card, so far no problem now (i stopped using FTPD).
Installed NSP/legit games started becoming corrupted too and the Switch wouldn't even start them (and checking their hashes via the built in checker would say i have to redownload them until I eventually formated it).
Had to reformat my SD Card, so far no problem now (i stopped using FTPD).
Installed NSP/legit games started becoming corrupted too and the Switch wouldn't even start them (and checking their hashes via the built in checker would say i have to redownload them until I eventually formated it).