1) You can put a 2TB M.2 drive in the 3582 2) Yes you can install a 2TB SATA SSD in addition to the M.2 drive 3) Dell specs and Crucial list the maximum as 8GB because there is only 1 SODIMM slot on the MB.
Computer: Inspiron 3582 So it currently has 1TB 2.5hdd and 8gb dd4 3200mhz. Dell says you can upgrade the ssd to 256gb in the m.2 and it maxes out memory at 8gb   What I am inquiring about is can I do these upgrades: 1) Put a 2tb ssd in the m.2 slot. 2) Install a secondary 2.5 ssd around 2tb 3) Install 16gb DDR4 3200mhz  
Computer: Inspiron 3582 upgrade questions?