I think you have some grave misconception.
First there is no Lightroom CC. That name, the CC part, was retired several years ago.
There are 3 versions of the Lr program.
Lr Classic (LrC) which is the Traditional version of Lr. Just like Lr 5 that you are currently using only updated with new feature and only available in the Subscription model.
Lr Desktop (LrD) which is the newer version that is Tied to Adobe Cloud system (Cloud Based) but only runs on REAL Desktop and Notebook Computers.
And
Lr Mobile (LrM) which is the version for mobile devices that run iOS and Android operating systems.
Then of course the Web (Cloud) version that runs in a Web Browser from over the internet.
If you sign up for the Photography plan for $9.99 a month you get LrC, Ps and LrM (I guess you can also install LrD) but only 20GBs of Online storage space (NOTE that when you upload images as Smart Preview from LrC collections (the only way to upload images from LrC) those Smart Preview are NOT Counted against your 20GBs of storage space).
The only time the Adobe Online storage space is used is IF you upload images from the LrM app or if you specifically use the Web interface and manually copy (Upload) images through the Web interface.
You can and Should move your Lr 5 catalog file over to LrC and it will be converted to a style that works properly with the newer version of LrC and WILL PRESERVE all your editing, Keywords, Collections, Labeling, Staring and whatever else you can think of just like it was in the Lr 5 Catalog file.
IMHO you do not need 1TB of storage space and you Should NOT use ANY Online storage system as a reliable solution for backing up any and all of your important files including your image files. That should be done locally and maybe some online system as a secondary, Just In Case everything else fails, solution. But IMHO NOT your First step in secure backup plan.
So FIRST STOP Using the CC after the word Lightroom. None of the current versions of Lr have CC in the names of the programs and or interfaces.
It will only confuse you and whoever you are talking to about whichever Lr program you want help with.
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