Hi Tattoo,
I am John, an Independent Advisor and a Microsoft user like you. I'm here to work with you on this issue.
Please type the formula below to cell V3
=U3&".jpg"
Then copy/drag down cell V3 to fill the rest of the column. You will notice the cell references change as well.
To retain the value without the formula, highlight all the cells that contain formula. Then press Ctrl + C to copy and right click > under Paste Options > choose the second icon (please see screenshot below)
I hope it worked out well for you.
Please mark this as resolved if as such. If not, please reply back to this forum and I'll be gladly to assist you further.
Regards,
John