as an AP, what kind of data should I download before system closing for upgrading to prepare for vender's inquiry? and how to download these data?

as an AP, what kind of data should I download before system closing for upgrading to prepare for vender's inquiry? and how to download these data?
Hello,
Try smartlist for all your Master and Transactions data. Definintly the consultant must be taking backup before upgrade.
Thanks much
Sandip