as i did my research, here is my 2sen. in nutshell,

a400 is dramless, it is only suitable for those who is casual users usually surf net, microsoft office application (not heavy user). Dramless ssd wears out faster than dram ssd.

if you are only looking for super cheap ssd without much reliability, a400 is for you.

i read overseas forum ssd, most recommend mx500 for reliability. mx500 is toyota.

those looking for bmw, mercedes, ferrari can opt for high end samsung ssd, optane.

if die die want cheaper one, buy bx500 at least it is from crucial not kingston.

sifu like tristanx, k!nex already advise.