Manually Create Offsite Copy Of Base Full Backup

Hello,

I just setup an offsite network storage drive for offsite backups.  The whole thing works pretty good, except that I use incremental backup, and the first full backup is over 100 GB, which just isn't feasible to transfer over a 20 Mbps connection. 

Here is my question:  If I manually copy and paste the full backup onto my network storage drive via a portable hard drive, will system recovery honor that copy and just continue on with the incremental backups?  In other words, I would put the inital full backup on the network drive manually.

Just wondering if anyone out there has any best practices that would be helpful.

Thanks!

Justin