Why is the autosave backup file useless? The 1.txt file cannot be opened with any PDF utility.
The temp files that are supposedly autosaved every increment we choose under Preference > Save Settings is worthless. Twice now I have spent hours marking up PDFs of production drawings and lose everything when Acrobat inexplicably crashes. The temp text file (1.txt) located in C:\Users\ <YourUsername> \AppData \Roaming \Adobe \Acrobat \DC \AutoSave\ cannot be opened with Acrobat, Chrome, Edge or any other PDF utilities.
Yesterday I spent 2 hours with AI massaging the temp file with Python scripts to repair the file which didn't work and still could not open the "saved" file. Best I could do was extract my text comments from the otherwise useless file.
Why don't you back up the actual file we are working on in its entirety with a PDF extension that can be opened with the software we are using (e.g. Acrobat)?
