Hey, i am wondering that why do my 2 KB PNG texture image turns into 200 KB via default import settings?? Why?
i think its because if you draw something to screen it is stored in the video memory uncompressed
200 kb is roughly 256256 (pixels) * 4 (RGBA - 1byte each) bytes so, my guess is you imported a 256256 texture and unity stored it uncompressed or showed the uncompressed size
Unity converts most of the image to the insisted compression format, if you dont want unity to compress (i knwo its wierd that compression increases size sometimes), use Override compression and set ur own.