Hi, you can replace existing 128GB SSD with this one: Kingston FURY Renegade with Heatsink (1000 GB, M.2 2280) Although please note that if you want to transfer existing Windows 11 Pro from 128 GB SSD to 1TB SSD you will have to do some cloning (Kingston Fury SSD has Acronis True Image software activation key included, which should help a bit with cloning procedure). Unfortunately I can't 100% confirm which RAM will work, because I ordered DDR5 by mistake, and it does not fit (I checked processor specification, which said it supports DDR5, but I should have checked MSI Cubi specs instead). Now I have ordered Kingston FURY Impact (1 x 16GB, 3200 MHz, DDR4-RAM, SO-DIMM) but it didn't arrive yet so I cannot confirm if it works fine. Even with 4GB of RAM everything works perfect.

Hi, according to specifications: 1x DDR4 3200MHz SO-DIMMs, up to 16GB.
1x M.2 SSD (auto switch) with heat sink
1x 2.5" HDD/SSD .