Then click the Select Disk… button, and you should see the network share. On the client which is going to back up to that network share, open the Time Machine pane and configure any exclusions using the Options button. Even backing up a fairly modest internal disk is going to take an hour or more if left to a Wi-Fi connection. Ideally, particularly for the first full backup, ensure that both the server and client are connected to the local network using wired Ethernet. Your network share is now ready for connection. If you want to enforce any maximum size limit on this share, this is the place to set that too.Ĭheck the remaining options, particularly users and their permissions. There tick the third item, to share the volume as a Time Machine backup store. Then select the name of the shared volume/folder in the Shared Volumes and Control-click it to bring up its options. Check that the list of users is appropriate, with the correct permissions, then click the Options button.Įnsure that the files and folders will be shared using SMB the older alternative of AFP has long been deprecated and shouldn’t be used. With the volume/folder to be shared mounted on the server, click the + tool at the foot of the list of Shared Folders, and add the shared volume/folder to the list of Shared Folders. For the sake of simplicity here, I formatted an external SSD on the server in APFS Case-sensitive format, then ensured that volume was already added to the Time Machine exclusion list on the server, so that the server wouldn’t try to back it up. The fundamental requirements for the shared folder or volume on the server are that it’s shared using SMB and designated as being available for Time Machine backups. This article looks at configuring and using TMA’s backup storage on a shared disk over a network – in this case, a shared APFS volume on another Mac running Big Sur. ![]() So far in my exploration of Big Sur’s new Time Machine feature to back up to APFS (TMA), I have covered exclusively backing up to local storage.
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