The usb port of device cannot transfer data and it cannot be repaired.
The bootloader of device is unlocked.
Once the device had a KitKat based ROM named PAC-MAN. Owner loves the ROM and the data soo much that he don't want to loose that hence he took a backup of this ROM and data from CWM recovery.
After a week, The official ROM of marshmallow was flashed from recovery. Got 5-6 continues updates of security patches and finally the device was on Android 6.0.1. Now when he wanted to roll back, he found the old recovery (CWM) was replaced by the stock marshmallow recovery.(due to security patches updates sent to devices.
The Owner wants to rollback to the same kitkat based backuped wih (CWM)
Device Name:- Micromax android one (first-gen) aq4501 sprout 4