I always empty it with the large hoover (it's definitely cheaper)

I ordered the dust bag, mop, side brush, cleaning agent etc. directly from the big Chinese company. Within 2 weeks you have the material you need. I now probably have stock for some time. I've had a Xiaomi for a few years now that only has to take care of one room. I haven't used up all the spare parts I ordered at the time:-)

The ones from Dreame X40 fit:
Roboparts Reusable dust bags for Dreame X40/X50 Ultra/ L10s Ultra Gen2 (3 x)

The ones from Grashüpfer.
They have a zip and are reusable.