That's not all that easy. They are located in the Tray folder (as I indicated above) but they are mixed in with Sims, pets and households.
A single Lot/House consists of multiple files in this folder:
- One .blueprint file
- One .trayitem file
- Several .bpi files, usually between 3-7 (more complex lots usually have more bpi files)
Where it gets tricky trying to backup ONLY the lots is that all of the pets and sims also have one .blueprint file. The other types for them are one .householdbinary file, one .sgi file and one .hhi file.
Personally, I just backup the entire tray folder. It's easier than trying to just pick out the specific things I want backed up. One thing you could do though is re-save all of the things you do want to keep to your Libarary, then just backup all the files with the new file date of when you did that.
Another way to do it would be to delete everything in your My Library except what you actually want to back up, using the trash can button when perusing your Library. If you do that, then the only files located in the Tray folder will be the ones you didn't delete. Seems like an extreme solution to me though. :lol: