Before migrating content, it is strongly recommended that you review all of your Sakai sites and decide which ones you need to migrate and which tool content in each course you want to keep.
Furthermore, if you have not already, please review the information on the "Sakai to Canvas Migration Information" page located here: https://stlawu.teamdynamix.com/TDClient/1805/Portal/KB/ArticleDet?ID=137936