pCloud adds a drive to your pc, so in a sense it is connected. Lightroom recognizes it and I can import and export to it through Lightroom, but if I create a folder in in through lightroom, it doesn't let me add the new folder. |
Most likely, Windows has indicated to LR that the drive is removable, like a USB flash drive. LR doesn't allow catalogued folders to reside on removable drives.
You can verify whether Windows thinks the pCloud device is removable by looking in the Disk Management application. A removable device is indicated as:

Yes, it appears Lightroom thinks it's a removable drive. Hoping that at some point, Lightroom will allow catalogued folders on these drives. It's very frustrating. This would be such a perfect solution for photographers looking to free up room on computers.
When pCloud announced their Lightroom plugin, I assumed it would allow their program to work with LR. Seems all it does is allow imported photos to be uploaded directly to pCloud. However, if I can't then see those files in LR, I won't be able to work with them.