Hi, Can anyone suggest a good external SSD (1TB) ?

Samsung ones are pretty good and portable

https://www.amazon.in/gp/product/B00GASLJK6/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&th=1 I have been using this for 3+ yrs now. No complaints.

You should also read about EVO vs QVO vs PRO, if you wish to buy a samsung one

Samsung Evo 870 is good TLC with DRam

I bought this one from Sandisk 1.5 years back. Going pretty strong and suffices my needs. But the price isn’t justified now. You can have a look at the Extreme version of the same or a similar one from Samsung, both of which I feel have a good price per TB.

I've been using the Samsung one, for ~2-3 years. Pretty good.