How would I be able to move a blender file to a different drive without having to...

…load all the textures again?

Me and my friend are collaborating on a game, so we are sending files back and forth over the internet, but now that we started texturing, we have to load the textures anymore, so I ask: Is there a way to remedy this, like a script or something? Many thanks would be appreciated!

make all paths relative

This is easier than you think. Click File >> External Data >> Pack into .blend file. This makes it so that the textures are saved directly into the .blend. Hope it works for you!