I accidentally installed hundreds of FOLDERS of presets (thousands of actual presets) to Lightroom CC and hence also, Lightroom Mobile.
It seems there is no way to delete multiple folders of presets at once from Lightroom Mobile.
I am aware that with CC Desktop, you can go into the actual library file by using 'show package contents' and remove all the presets there, but it is little known that this does NOT actually rid them from Lightroom Mobile. Those presets are stuck on the cloud.
It seems the only way to remove them from Mobile is to actually remove them within the CC Desktop interface. (not via the library file) HOWEVER, the CC desktop interface does not actually provide any way to remove multiple folders of presets at once. The only conclusion I can see is that you have to click each folder individually and delete. This is clearly absurd with hundreds of folders of presets.
I'm not seeing any workaround here either after searching everywhere. Does anyone have any ideas for this?