Incremental update - CSV

HI

I would like to know how to do incremental update (CSV).

e.g.)
*Old CSV
A,B,C,D
1,2,3,4

*New CSV
A,B,C,D
1,2,4,4
2,3,4,5

need to be update like this↓

A,B,C,D
1,2,4,4
2,3,4,5

I mean, I want to add new line and item which has changed.

Regards,

Taiga

Use Append Range activity to add data

Thanks
@taiga0206