Texture compression

Hi, I am using unreal engine 4.25.3. In this version when I import 2k albedo texture its default compression makes its size 2731kb. No matter what texture AO, Roughness when it is 2k it size in default compression is 2731kb. When I import texture less than or greater than 2731kb it compress it to 2731kb. The problem is when its size is greater than 2731kb then compression is ok but when its size is less than 2731kb (say 1mb) the default compression makes it size bigger than actual file size. This is not what I want. After several trials and error I have found that size of 2k texture (no matter how much size it is) it’s default compression brings it size to 2731kb. Same as when we import 1k texture its size in default compression is 683kb.

Note:- Normal map compression also sometimes becomes bigger tha actual file size.

Please help me I am developing game for android. When it’s compression makes file size bigger my game will not work on most of the devices. Please help me how to import texture at no compression or any other way to not compress texture size.