Pier

Pier is a Windows 10/11 app that mounts Nextcloud, ownCloud and any WebDAV server, SFTP over SSH and NFSv3 exports as a real drive letter, so Explorer, Office, backup tools and scripts see an ordinary disk. Files are fetched in blocks into a local cache, so only the parts you open cross the network. Interrupted transfers resume, the drive reconnects on its own after a Wi-Fi drop or VPN reconnect, and an offline mode keeps working from the cache. Pier Backup, for encrypted versioned backups to WebDAV, SFTP, S3 or NFS, is included. Free for up to 5 drives with an ad banner and no time limit; Pro is USD 19 per year. Windows 10/11 64-bit and Windows Server 2019+.