Google drive

Google provides us with more than 7 gigabytes of mail storage. Why not take advantage of this and not store data on a google server?

This is where the GMail Drive> program can help. After installation, the system adds a “GMail Drive” logical disk, which is associated with a GMail account. To view the contents of a virtual disk, you must authorize.


On the disk, obtained as a result of the work of GMail Drive, you can create folders, as well as copy, move files. The program also creates the necessary emails, where the attachments will contain files from the GMail Drive disk. In letters created in this way, the topic will contain the word “GMAILFS” and the path to the file on the GMail Drive virtual disk.
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In addition, the total length of the file name (including the full path to it) can not exceed 65 characters, and the maximum size of a single file can not exceed 20 MB.

The program is compatible with at least WinVista.
Program website (for windows)
Bonus:
gDisk - analog Gmail Drive for Mac OS X
GmailFS is an analogue of GMail Drive for GNU / Linux.

[UPD]: But it’s not too much to actively abuse, using FTP as an FTP (follow the link - Wikipedia, in more detail)