Be careful though - some of these require a fairly high level of knowledge and it's always good practice to back everything up first. Testdisk is a powerful tool but you need to know what you're doing. Hope this helps!
No need, just copy the contents of the partition to an external disk (i.e. the backup). You need a software to that. Preferable EaseUS Partition Master Home edition or something. Free version i think. Download and install it from their website and you are good to go.
I used the same software when converting my dynamic partition to basic partition.