Nextcloud and OpenMediaVault (OMV) are powerful free and open-source software (FOSS). By using them in tandem, you can build and deploy your own private cloud storage and network-attached storage (NAS) with an intuitive web interface for storage management.
How to Install Nextcloud on an OpenMediaVault NAS on Raspberry Pi
Add personal cloud storage to your OpenMediaVault-based NAS running on Raspberry Pi by installing Nextcloud.