Raspberry Pi 4 OMV NAS tutorial, including hardware selection, software installation and configuration. This video explains all you need to know to start using a Pi 4 -- or any other Raspberry Pi -- for sharing files across a local area network (LAN) using OpenMediaVault.
PLEASE NOTE THAT since this video was made the process for installing OpenMediaVault on a Pi (or other SBC) has changed, and the software has also been significantly updated (twice!). So I have a video setting up the latest version, OpenMediaVault 6, on a Pi here: https://www.youtube.com/watch?v=IWDBYDYJVrA