A surprising number of "my NAS drive won't install software / won't show up in backups" problems come down to one distinction that Windows makes very quietly: a mapped network drive is not a disk. Both give you a letter you can double-click. Underneath, they are different.
Source: [Dev.to](https://dev.to/scsoi/mapped-network-drive-vs-mounted-drive-letter-what-actually-changes-in-windows-6ig)