Hi,
There are some really painful options, one of them is what you have mentioned. What I would do:
1. Upgrade to full BIMcloud
2. Create full BIMcloud backup (
https://helpcenter.graphisoft.com/user-guide/71482/)
3. Install new BIMcloud to your new disk
4. Restore backup in this new BIMcloud - make sure the old BIMcloud is not available anymore!
5. Downgrade BIMcloud (
https://helpcenter.graphisoft.com/user-guide/83080/)
Also, in case of hotlinks, you may need to relink them one by one, or you can add the old address as an optional one in the list, but in this case you need to make sure the old path is not available anymore.
I hope this helps you.
Kind regards,
Noémi Balogh
Community Expert, Admin