Microsoft says to use an external drive, it MUST BE 256GB or larger.

He’s the one I use.

KingSpec 256GB SSD 2.5 Inch Hard Drive SATA3 Internal Solid State Drive P3-256 https://www.amazon.com/dp/B076BM28CF/ref=cm_sw_r_cp_api_i_zfF8Ab6ZAKX5Z

And it’s case

Sabrent 2.5-Inch SATA to USB 3.0 Tool-free External Hard Drive Enclosure [Optimized For SSD, Support UASP SATA III] Black (EC-UASP) https://www.amazon.com/dp/B00OJ3UJ2S/ref=cm_sw_r_cp_api_i_jgF8AbAX7TENT