Hi @Brian_1
Unfortunately an export as a PDF isn’t available, but we do offer an export of the account as CSV files. CSVs are more widely supported in terms of data portability, so they can be used to re-import data at a later date (or elsewhere) if needed.
There’s more information on this here: Create a data backup schedule
Regarding your attachments, this can also be done by following this guide here: Download an archive of your documents
It’s worth noting that a digital copy on QuickFile is more than sufficient when it comes to a HMRC investigation. As long as you can find things easily, it should be fine.
Hope that helps!