Sometimes in Lightroom, just having a Smart Preview is enough.

Using Smart Previews saves having hard drives plugged in all the time, edits can still be made and images exported at a reduced size from the original.

But if you need to export the original file size for printing, for a client or even to make further edits using Photoshop or other software then you will need the original file.

It does happen that when you do some tidying in your hard drives, files and folders can get moved and Lightroom will see them as Missing.

In this case, my Q drive started to have troubles and I moved to using my second copy on a new drive.

There are, as always, a few ways to do anything in Adobe products.

Here, I have a Smart Preview and want to locate the original photo: