Hi @matteo_4230,
Sorry to hear about the crashing and error messages while exporting high-res PDFs. From what you've described, it sounds like this could be linked to file sync issues.
While saving files locally is definitely the most stable approach, if that's not possible, I'd recommend working from a local copy of your InDesign file. Try downloading the file from Drive to your desktop, working on it there, and then re-uploading once done. This helps avoid potential database or permissions errors that can occur when InDesign tries to write live to the cloud.
Also, could you confirm if you're seeing the Adobe Crash Reporter dialog when the app crashes? If yes, please submit the crash report and send me the email address you entered in the dialog via DM so I can pull the logs and investigate further. Reference: https://adobe.ly/3IOTNpJ
Let me know your InDesign version and OS as well.
Happy to help further once I have those details. Looking forward to your update.
Abhishek