New storage recommendation

[Schokio]

Hello guys,

currently I am running with the following:

• Samsung 860 EVO 500 GB as my operating system drive (mainly used for programs that can't change their installation path) [20% filled]
• WDC WD10EZEX-75WN4A0 1 TB for everything not game related like documents etc., programs and games that i rarely touch [50% filled] 
• Samsung 850 EVO 250 GB as one of my drives for games (leftover from an older pc, hence the small size) [80% filled]
• ADATA SX8200PNP 1 TB as my other games drive [90% filled]

I am thinking of getting more storage for coming stuff, but I dont really know whether another SSD, HDD or NVME and which size would be the best in my case.
Another SSD or NVME of 1 TB or 2 TB feels like the best IMO. Or a big HDD ... I dont know

Maybe someone has a clue or recommendation on how I can expand my storage ... replacing the 850 EVO could be also an option

Best greetings

PS: Dunno if this is the right subforum or if "New Builds and Planning" is better suited for this.
PSS: Only thing that could "help" I guess that I have an B550 Gaming Carbon WiFi as my Mainboard