Having an extra drive offsite is a great idea. The terms of service for Everpix are shady..

"By displaying or posting any Content on or through the Everpix Services, you hereby grant to 33cube a non-exclusive, fully paid and royalty-free, worldwide, limited license to use, modify, delete from, add to, publicly perform, publicly display, reproduce and translate such Content in or through the Everpix Services to you and to those other users with whom you choose to share such Content."