My computer crashed, so I reinstalled Windows 10 and lightroom. Lightroom doesn't find my photo's on my external harddrive. Instead my photo's are on Offline HD's(?) with questionmarks. How can I fix this?
Please take a look at this article Recover catalog and images after resetting preferences in Adobe Photoshop Lightroom and let us know if that helps.
See the instructions in this document, particularly Figure 4 and associated text
Adobe Lightroom - Find moved or missing files and folders
Retrieving data ...