You might at times find that despite a success message, Automatic Backup hasn't been uploading certain documents, which can be found by tapping the auto-backup status icon from the Documents tab and checking the "Excluded Documents" list:
If you've set the auto-backup format to PDF, the app is likely having difficulty exporting those documents to PDFs. This typically happens to documents created from large PDFs, e.g. medical texts, or notebooks having a massive number of annotations. Because generating a PDF consumes a lot of memory, the app might not be able to complete it using the limited RAM of your device. If you can't manually export such a document to a PDF, resulting in a crash or a stuck process, you know the document is likely too large for your device to handle.
If tapping those excluded documents to add them back to the auto-backup queue doesn't help, please change the auto-backup format to the native GoodNotes format. You can later import those .goodnotes documents to GoodNotes for macOS (which you can redownload for free if you have a Mac) and export them to PDFs as needed. You'll likely succeed because the Mac is much more powerful than your mobile device in computing power and memory. If you don't have a Mac, you can send us those documents and we'll try exporting them to PDFs for you.
To prevent this issue, you might want to:
- Keep your notebooks small and start new ones often. Don't cram every annotation into a huge notebook.
- Compress your original large PDFs and use the compressed versions instead to reduce the memory requirement for exporting them to PDFs later.