NO, Acronis will delete everything on the seagate as it reformats it. Wipes it clean, then installs clone. There's a way to save some files but you don't want to do that. You wud only save some files if you wanted acronis to only install files that have been changed over a previous clone, bookmarks may have changed, xcell spredsheet etc. The OS wud not have changed.
Under disk utilities>add new hard disk for the seagate then do the clone.
Under disk utilities>add new hard disk for the seagate then do the clone.