I’d prefer using terms that don’t conflict with the description of Syncthing and Nextcloud.
Syncthing is a file synchronization solution. Nextcloud at the most basic level is a file server.
File sharing conflicts with the Sharing app.
Of the current options we have, “Network File Storage” seems like the most accurate way of describing what Samba is.
“Remote File Storage” is somewhat confusing, since Samba app is meant for internal networks only.
“Local” would also be confusing. Local to the client or local to the FreedomBox server?