If it works like iTunes used to then no. Your backups have to be on the main drive.
I'v seen some eople say that its possible to go back only for a few days from when the beta came out and the you'd have to wait for the official update to release. Is it true? And is it safe usually to update to the beta this early?
It’s not possible to roll back on device level or hasn’t been possible up until now. Personally if you’ve not tried beta testing before I’d wait patiently until beta 2/3 or public beta 1 if it’s your main device.
To be honest, if you’re asking these types of questions you shouldn’t even bother. You’ll be on the beta for a while and there’s literally nothing groundbreaking about iOS18.
I back up directly to my synology nas as my Mac doesn't have enough space. I would imagine it would work the same with an external ssd. I just gave terminal full disk access, then created a symlink from the mobile backup location to my nas setup.
When I look in the General > Softwere Updates and there it says: install update and not download update
You should be able to delete downloaded updates from Settings > General > iPhone Storage.
www.macrumors.com
iOS 18 beta doesn't interact properly with Sonoma, you need to either be on macOS Sequoia beta or have Xcode installed if you're on Sonoma to fix that. That could be the cause of some of your issues. Also you can't update to iOS 17 from 18, you need to completely erase and restore the phone from your Mac. If you successfully enter recovery mode it won't ask about Find My. To get to recovery mode you must keep holding the button even after the Apple logo comes up until the screen changes to the image of a computer.Typical Apple bs & lack of care .... there is no way I can downgrade to iOS 17 from iOS 18 public beta (sorry I wanted to take a peek now). iPhone 15 Pro Max [you'd think I'd paid enough to get a little professionalism from Apple].
Mac Sonoma keeps trying to install an update to phone, but fails every time;
Finder cannot reinstall iOS 17 backup & indicating that Find My needs to be disabled on the phone (which it is);
As per the recovery instructions provided here & elsewhere, the Phone refused to do this as well.
How to Downgrade From the iOS 18 Beta to iOS 17
If you installed iOS 18 Beta or iPadOS 18 Beta through Apple's Developer Program or Software Beta Program, you may decide you want to downgrade...
More garbage & lack of support from Apple.
What? You blame apple because things aren't working as you expected from being part of a beta version? Wow. For years you have to install Xcode to make your phone being recognized with the current macOS if the phone is on a major release ahead. The process is still very simple though. If you don't know how to downgrade or you expect to have no problems when installing a pre-release OS, maybe betas aren't for you.Typical Apple bs & lack of care .... there is no way I can downgrade to iOS 17 from iOS 18 public beta (sorry I wanted to take a peek now). iPhone 15 Pro Max [you'd think I'd paid enough to get a little professionalism from Apple].
Mac Sonoma keeps trying to install an update to phone, but fails every time;
Finder cannot reinstall iOS 17 backup & indicating that Find My needs to be disabled on the phone (which it is);
As per the recovery instructions provided here & elsewhere, the Phone refused to do this as well.
How to Downgrade From the iOS 18 Beta to iOS 17
If you installed iOS 18 Beta or iPadOS 18 Beta through Apple's Developer Program or Software Beta Program, you may decide you want to downgrade...
More garbage & lack of support from Apple.
Typical Apple bs & lack of care .... there is no way I can downgrade to iOS 17 from iOS 18 public beta (sorry I wanted to take a peek now). iPhone 15 Pro Max [you'd think I'd paid enough to get a little professionalism from Apple].
Mac Sonoma keeps trying to install an update to phone, but fails every time;
Finder cannot reinstall iOS 17 backup & indicating that Find My needs to be disabled on the phone (which it is);
As per the recovery instructions provided here & elsewhere, the Phone refused to do this as well.
How to Downgrade From the iOS 18 Beta to iOS 17
If you installed iOS 18 Beta or iPadOS 18 Beta through Apple's Developer Program or Software Beta Program, you may decide you want to downgrade...
More garbage & lack of support from Apple.
That failed update is the MobileDevice.pkg that you install from an Xcode.Typical Apple bs & lack of care .... there is no way I can downgrade to iOS 17 from iOS 18 public beta (sorry I wanted to take a peek now). iPhone 15 Pro Max [you'd think I'd paid enough to get a little professionalism from Apple].
Mac Sonoma keeps trying to install an update to phone, but fails every time;
Finder cannot reinstall iOS 17 backup & indicating that Find My needs to be disabled on the phone (which it is);
As per the recovery instructions provided here & elsewhere, the Phone refused to do this as well.
How to Downgrade From the iOS 18 Beta to iOS 17
If you installed iOS 18 Beta or iPadOS 18 Beta through Apple's Developer Program or Software Beta Program, you may decide you want to downgrade...
More garbage & lack of support from Apple.
How is you running a beta Apple‘s fault? It says several times to back up your data when you join the beta program and again when you download the beta software. I don’t care about defending a multi-trillion dollar company but stop being stupid then getting mad at others for your own stupidity.Typical Apple bs & lack of care .... there is no way I can downgrade to iOS 17 from iOS 18 public beta (sorry I wanted to take a peek now). iPhone 15 Pro Max [you'd think I'd paid enough to get a little professionalism from Apple].
Mac Sonoma keeps trying to install an update to phone, but fails every time;
Finder cannot reinstall iOS 17 backup & indicating that Find My needs to be disabled on the phone (which it is);
As per the recovery instructions provided here & elsewhere, the Phone refused to do this as well.
How to Downgrade From the iOS 18 Beta to iOS 17
If you installed iOS 18 Beta or iPadOS 18 Beta through Apple's Developer Program or Software Beta Program, you may decide you want to downgrade...
More garbage & lack of support from Apple.
You cannot restore a backup to iOS17 that you took in iOS18.
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