Content Migration from TeamSite 7.3.2 server to TeamSite 8.2 server

Hi All,

Did anyone try content migration from TeamSite 7.3.2 server to TeamSite 8.2 server?

We have 210 GB of content ( which has 10+ branches, 30+ editions ), so it will take huge amount of time in migration. Instead, I am planning to migrate just one workarea per branch which comes to around 10 GB. I tried to copy one branch using rsync command, but when I try to edit any DCR's they are not getting opened. TeamSite is treating them as binary files or plain XML's. Do we need to run any script to make these plain XML's to TeamSite understandable DCR's?

Am I missing any content migration steps? It would be great if anyone has content migration steps.