Several questions on ssd portable harddrive, thunder port, and monitor

I have a Custom Built MSI GT75 8RG TITAN-056 17.3" w/ G-Sync nVIDIA GeForce GTX 108 LCD Panel

I would like to get a SSD portable harddrive to store more games on it. Which one should I get?


Samsung X5 Portable SSD - 1TB - Thunderbolt 3 External SSD (MU-PB1T0B/AM) Gray/Red https://www.amazon.com/dp/B07GBWZJFG/ref=cm_sw_r_other_apa_i_brVNDbSZ7PKB8

Or

Samsung SSD 860 EVO 2TB 2.5 Inch SATA III Internal SSD (MZ-76E2T0B/AM) https://www.amazon.com/dp/B0786QNSBD/ref=cm_sw_r_other_apa_i_7sVNDbRP248PF

The reason I am not sure which one to get is because I am. Also getting the steam index VR and I belive I need to use the thunder port connection for it. So should I get the
Samsung X5 Portable SSD - 1TB - Thunderbolt 3 External SSD along with a thunderbolt dock something like this to operate the SSD and the VR unit?

CalDigit TS3 Plus Thunderbolt 3 Dock - 85W Charging, 7X USB 3.1 Ports, USB-C Gen 2, DisplayPort, UHS-II SD Card Slot, LAN, Optical Out, for 2016+ MacBook Pro & PC (Space Gray - 0.7m/2.3ft Cable) https://www.amazon.com/dp/B07CZPV8DF/ref=cm_sw_r_other_apa_i_zvVNDbVWEYGX2

Also what if I decide to get a ultra wide monitor, does it operate on thunderbolt as well?

Sorry for all the questions but I don't have a lot of knowledge in the this new tech stuff
Thanks, Randy