Time Machine Read Only Issue

[chrisf60647]

Hi guys..., I can't figure this out. I bought an external drive the other day for TM. The plan is to back up my Mac and my wife's MacBook Air. The local Mac Mini backs up fine but the Air is having trouble.

The Air can see the TM Location but can't authenticate or write to the drive. It keeps telling me 'The Selected network backup disk does not allow, reading, writing or appendin.g"

I've tried creating a new user (admin) for authentication and even allowed guest (not ideal) as well. Anything Im missing here? It must be disk-related, but I checked this permission as well. It seems to work from on an old USB stick but this new drive is giving me fits. Thanks in advance

 

[kitKAC]

Need more details, what drive is it? Is it network attached?

 

[Bigwaff]

The local Mac Mini backs up fine but the Air is having trouble.

Attached drives can’t be used as remote TM destinations unless you format them as APFS, create a folder, and share folder as TM (it’s option when sharing folder)… but, now you can’t use drive for local TM backups because TM will want to reformat or claim entire disk. If you want to use drive for both local and remote TM clients, you will need to format APFS and create two separate volumes. One for local TM backups and the other for remote TM backups, where the shared folder has been set up.

 

[chrisf60647]

External 1Tb hard drive. Connected via USB-C. So not network attached...local attached.

 

[chrisf60647]

Thanks All. I created a network share as stated above. I thought TM maybe would have this figure it out as it sees the TM location but the permissions issue kicks in. Works now