What is a CRYPT File Type?
Create CRYPT files manually. Select WhatsApp → [Phone Menu Button] → Settings → Chat Settings → [Back up conversations ]. The CRYPT file will be created as msgstore.db.crypt and saved in the following directory:
/sdcard/WhatsApp/Databases/
To restore your messages from a CRYPT file, uninstall your WhatsApp program, rename the file you want to restore to msgstore.db.crypt, install WhatsApp, and select Restore when prompted.
Since the CRYPT files are saved in encrypted format, they must be decrypted before d' be opened or restored. If you are logged into the same Google account you used to create the backup, WhatsApp can decrypt your registered CRYPT files. Alternatively, WhatsApp can request a quote file; key file &" saved on the device to decrypt the file.