Cannot drag and drop drum hit samples into Groove Agent

I have Cubase 10.0.15 and want to be able to drag and drop drum hit samples from my windows folder into C1 of Groove Agent to load them all onto different pads at once (much quicker then having to import individually and assign individually)

However when try and do this I get a circle with a line through it so can not drop the files onto the pad

I have seen multiple videos where people seem to be able to just drag and drop without having to import into the main project first so wonder if there are any settings I need to change? Project is 44.1khz and samples I have tried are .aif and .wav


First of all, I would recommend to update to the latest Cubase 10.0.60.

As far as I know, you can drag and drop from the project only.