Saving Large File without Decompressing

Hi guys, this is a newbie question. It is my first post and I am not sure this is the right forum, but I am sure if it not somebody will tell me. I would like to save a file which is inside a Zip folder. Since the inside file is 3 Gb it takes forever to decompress, so I was wondering is there any effective way to save it without decompressing? If anybody know it would be great! Thanks and Best!

Sebastiao