From the time user connects to your server, up to time
you're accessing this property, it will keep (and
regularly increase) total number of bytes downloaded by
connected user. This value can be used for some statistical
or similar purposes.
You can reset this value to 0 at any time, or set it to
any other value at any time. For instance, if you want to
memory total downloaded bytes across all the sessions by
the user, you should store this value to your database when
user disconnects, and then take it back from database and
put to this property when user logs in.
Note that this value specifies total number of bytes in
unencrypted form. Additional data can be added by wodSSHD
in each packet, such as packet information, digest byte
array etc. , but this is not added to BytesDownload
property.