Hi Rajiv Sharma,
Checking the drive on multiple PCs was a good idea. Could you check if the pendrive is recognized in Disk Management? Does it have a file format and a drive letter? If the drive is not listed there, unfortunately, there may be an issue with the device and I would recommend you to try saving your data using data recovery software. I leave you some suggestions in the link below. Once the data is saved, format the drive and check if it is working. If it is not, you should think about getting a new pendrive.
Hope this helps