Yes, Images from Lightroom mobile goes to the default location that is C\users\pictures\Lightroom\Mobiles download.lrdata and you can not change it.
As even if you drag the above folder to the H drive, you will get exclamation marks on all the images synced so far though you can reconnect them to the move location but the next time you get images from Lightroom mobile that will go back to the same default location as per designed.
If you want to raise a feature request for the same you can visit the following page :
But, how can I import then this LR-Mobile Photos from C:\users\pictures\Lightroom\Mobiles download.lrdata to my default catalogue incl. moving physically the pictures to the drive h:\?
Unfortunately its not possible to move them.
As I said you need to do it every time you sync new images so its not feasible.
Maybe we missunderstand us.
There must be a way to integrate this fotos from LR-Mobil to the standarf cataloque. Either by importing (but I did not find the pictures) or by importing "from an other catalogue" (but I did not find a catalogue).
Otherwis the whole LR-Mobile is not usable!
No one an idea? How to get the LR-Mobil Photo on my PC in my standard catalogue on my PC?