I use Apple Books app to read a PDF textbook. I highlighted a lot of stuff on around 500 pages of small font text.

I sync all my progress to iCloud. Yesterday, I turned off Wifi during reading to focus on studying.

Today, I opened the app and clicked on the book but it didn’t open. I tried troubleshooting for the whole afternoon but couldn’t get the file to open. I essentially have to reread 500 pages and highlight everything again.

Always, always back up your work.

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[–] 6 points 1 year ago (2 children)

I know this isn’t super helpful at this stage but using a Focus is a good way to lock in while still staying online: Use a Focus on iPad

Sucks though, sorry to hear about this.

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