Yes, it is an error. I've been reporting this for a long time, but it doesn't seem to be that important for digitec to correct it. I have had the S10 5G for a few days now and the memory is fixed at 256GB and cannot be expanded.

I believe this has been corrected in the meantime. Unfortunately, the MicroSD cards are still listed in the accessories. This is a pity, as I am used to digitec only displaying suitable accessories. So a wrong purchase can happen quickly if you are not careful... Thanks for the previous answers, they answered my original question straight away :)

I can confirm that Samsung seems to be going the way of Apple. What's 'in' is in, that's all there is to it.