On sale at Newegg, a 1Tb (actually 960Gb) M.2 SSD for $200 .. 33% off (laptop needs to have an M.2 slot .. separate from the HD connection .. many do).
On my Dell laptop, I have a 500Gb M.2 SSD and a 1Tb standard SSD (Samsung EVO 860)
Samsumg MZ1LV960HCJH 960GB PCI Express Gen3 x4 M.2 Enterprise SSD - Newegg.com
On my Dell laptop, I have a 500Gb M.2 SSD and a 1Tb standard SSD (Samsung EVO 860)
Samsumg MZ1LV960HCJH 960GB PCI Express Gen3 x4 M.2 Enterprise SSD - Newegg.com