Quick answer
Clean up imported documents by finding duplicates, failed imports, temporary files, and items you no longer need. Do not delete anything until you know which copy contains your notes or progress.
Work in small batches.
Start with safe deletions
Old downloads you can re-download, obvious duplicate files, and failed zero-byte or tiny imports are good first targets.
Open the kept copy before deleting the duplicate.
Protect notes and highlights
Some reading data is linked to a specific file.
Export important notes when the reader allows it, or keep the exact file that owns the annotations.
Check backups
A backup only helps if it exists and can be opened.
Test a few files from the backup before deleting originals from the phone.
Repeat every few months
Small cleanups are easier than rebuilding a library after storage becomes full.
Keep the system simple enough that you can understand it later.
Detailed troubleshooting checklist
Work through the problem in this order: first check imported documents itself, then the app, then Android or the device. Keeping that order prevents you from changing many things when only one part is wrong.
- Change one setting at a time.
What to remember
The answer does not need to be complicated. The useful result is that you can remove clutter without losing reading history or important files without repeating the same setup every time.
Repeat the return task from a fresh start
For “Imported documents: simple cleanup and maintenance”, a library system is only useful if it still works tomorrow. Reopen the app from the beginning and repeat the same find-and-return task before adding more organization layers.
- For “Imported documents: simple cleanup and maintenance”, keep a backup outside the library before a large cleanup or move.
- Use a small sample of real books and documents with the same messy names or folders you normally deal with.
- Open a book, leave it, and return later to see whether progress and recent history reduce the search work.
What a good result looks like
For “Imported documents: simple cleanup and maintenance”, a good library setup lets you find, open, and continue reading without remembering a complicated filing system.
For this guide, stop adjusting once the workflow for “Imported documents: simple cleanup and maintenance” is clear, repeatable, and easier than the problem you started with.