120 GB is kinda tiny fr modern applications. a Blue Ray runs around 4 GB in size, Modern games can be 12-50 GB.
But it is SDD no HDD cuz the HDD is a wd red 2tb
Missed the second drive when I was looking over your parts list! yeah, 120 GB SSD + 2 TB HDD is fine.
(my own HTPC is a 'salvage' PC with a 120GB HDD in it, which was plenty in 2006 when it was made)