Drives not detected

Need help! When I boot into big sur it does not detect my hard disk neither my ssdAlso during the text it says device is write locked

My laptop:Hp elitebook 840 G3Core i5 6th Generation8 Gb ddr4 ramSanDisk 256gb m.2 SSD+ 250 gb HDDTouch screen

submitted by /u/ahmeddirfann
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