If my N360 subscription expired, will I still be able to access my online backed-up files?

i.e.: not to create a new online back-up – just to download the files back to my pc

You can download online backup files through https://nobu.backup.com/n360

 

But I suppose you should do that as early as possible after the expiry of your product.

Thanks for your answer!

 

Do you know what is the exact "grace period" after which I will not be able to download my files?

I am sorry I am not aware of the exact grace period.