Hello my name is ***** ***** you please provide the make and the model number of this machine please?
Ok bare with me I am looking up this model to see if it has a built in recovery partition.
If you press-and-hold the Volume Up button while booting, it should automatically launch the Samsung System Restore app, please give that a try.
Hi. My name is***** you for your question and the opportunity to assist.
Please see the attachment for instructions on how to boot from an external drive.
It looks a bit tricky to me.