Disappointed that I didn't know to transfer the mobile downloads.lrdata file from my old computer to my new one. I transferred all the catalogue details, just not this data file. All previously uploaded photos from my cell phone are missing and when I click the exclamation point to "find missing files" the previous location is this mobile downloads.lrdata on my old computer.
Adobe help has not provided a way to redownload mobile downloads.lrdata data file to my new computer so all my mobile photos (which appear on my phone and on the web versions) are gone from my lightroom classic desktop version.
If anyone has any experience re-syncing this mobile downloads.lrdata file with previously uploaded mobile photos, I would HIGHLY appreciate it.