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4 months agoCan’t answer your question exactly, but I can speak to MagSafe chargers generally if that helps. I have an older (now discontinued) Apple MagSafe battery pack and it works just fine. Doesn’t disconnect at all. It charges maybe a smidge slow but not really noticeable.
Why write off iCloud? Just turn on the advanced data protection feature for end to end encryption.
If you want to self host, while I’m not familiar with Goodnotes I bet you could write a simple Apple shortcut to take those files to a storage provider like nextcloud then just automate that shortcut to run daily, weekly, whatever.