First I should thank DriveHQ.com for its convenient and thoughtful service. I think it's the best so far. Enjoy using it.

I now really need to know this-- Can I recover used space after I delete previously stored files? Or the max storage space just means the total uploadable bytes ever?

Thank you!

Yes, sure you can delete files on DriveHQ and recover storage space. There is no limit on upload, except if you are a free service user, it will ask you to upgrade again and again.

The download bytes is based on monthly usage. It is reset at the beginning of your billing date, which is the day-of-month when you signed up DriveHQ.com