If you're switching machines, you have to dig into your system files to transfer all of your custom everything - including hidden folders on the - and there's still stuff that always gets left behind somehow.

There's no way to create a copy on import or even to rename it on upgrade.

For instance, you have to upgrade your old catalog not just to use it, but to import from it. Migrating and upgrading can be a major pain. Just the Smart Previews and regular Previews files for a single catalog of mine together take up more than 20GB on my portable drive. Otherwise, they'll use a huge amount of space out of your 20GB limit. Though it will work if you store your catalog in Creative Cloud, that only works if your catalogs are small and you don't use Smart Previews - which means you probably don't sync with the mobile apps and therefore have no reason to subscribe. Its database is based on SQLite, and that's why you still can't put catalogs on network volumes, either for personal or collaborative use. Lightroom remains hampered by its outdated architecture.

Adobe lightroom cc 2015 google drive