>>> I don't understand what devices or users mean.
In general, DriveHQ service does not limit devices. You can connect to our service from any devices/computers. You do need a username & password to log in to your account. DriveHQ has millions of users. Username & password is needed to protect your account security. Other users cannot access your files.
>>> You never share a password for data, even with family. You might have a guest area to chuck a large file to someone. But the guest area should be the world, not a user.
Exactly. On DriveHQ.com, you can use our Group Account service to achieve fine-granular access control. You can create a sub-user. A sub-user works like a regular user, except that it is created by the group owner. The group owner can manage or delete the sub-account.
A sub-user can log in with his own username and password. By default, the sub-user cannot see your files. But you can share a folder with the sub-user. More generally, you can share different folders with different sub-users and set various permission levels. When a sub-user logs in to his account, he can only see folder(s) shared with him.
>>> As far as devices go, I gave up being married to one computer or phone or printer years ago, because I would take days off to fix a printer, phone or computer, which go down constantly.
>>> I also use many OS's and programs capable of ftp. Since, I do not need to be awake to use ftp, it is far easier to use than a stupid interface.
You are not limited to any particular devices/computers/OS's. You just need to access DriveHQ's website or FTP server and log in.
>>> I pay about $99 a year for 5 tb from microsoft, but the problems is that they don't do ftp, and file uploads can take days to get to the cloud. FTP in a command line is instant upload.
Indeed, FTP is very convenient, efficient and reliable. You can also use DriveHQ FileManager client software for uploading/downloading large amount of data. FileManager works like FTP client, but is even more efficient. FileManager is available on Windows, Mac, iOS and Android.