User flow

User clicks 'purchase'.

1. User enters email address, name and password.
2. User asked to enter credit card details. (won't be charged until you make your first backup).
3. User created
4. Set maximum storage space
5. "Configure new site"
6. Download plugin
7. Storage limit (you are only charged for the storage you use (rounded up to the nearest GB), this will be the maximum amount of storage before we block further backups)
8. Get setup code (8a9sd7a90s8d0as98d0a9sd80a) Enter "setup" key (How do I get a setup key?).
9. Just checking a few things
10. Connected to the internet
11. Connected to Volcanic Pixels
12. Can write logs?
13. Getting setup info (access_token, max_storage)
14. Indexing content for first time (calculate "uploads", "plugins", "themes" and "database" files).
15. Setup successful :) {Configure backup}
16. Configure Backup.
17. What to backup
18. Uploads 1,234 files 1.2GB (maximum space, this site, other sites).
19. Run first backup
20. This bill: £2 (With calculation)
21. Next bill: £2 + storage cost (table with current usage)
22. Schedule
23. Advanced

Successful payment :)