No, actually, but don't panic.
Welcome to linux.org
@User_348
Four of the folks above are my good friends, so they will know I mean no offence when I say to three of them that there is no way known a fresh Debian install should take up 26 GiB. It should consume less than half that.
Brian
@Condobloke is likely closest to the money with what he says at #8
That being said, I have not used netinst,iso, nor do I have an NVMe SSD.
I do have an M2 SSD and both internal and external SATA hard drives, so I will run some tests for comparison.
Allow for my being on east coast Australia.
Cheers
Chris Turner
wizardfromoz
PS I will choose KDE Plasma for the DE (desktop environment) as it will likely take up the most space, but if you get a chance
@User_348 you could let me now which one you chose?