Check Disk Management like I said. If your emuNAND is gone and your NANDs were unlinked there's probably nothing you can do. If the NANDs are linked you should just need to reinstall the tickets of your games, which if you used FunkyCIA, CIAngel, FreeShop, tikShop or similar, you can do by going to the title key site and scanning the QR codes for the games in FBI, and selecting NO when it asks to install content from CDN (otherwise the saves are wiped)
But if you got the CIAs from some site online then you would need to find those same CIAs again and somehow extract the tickets from them.