texture file

if you pack a blend file then if you have a texture file it becomes embeded with the blend file
which is easier to transport to other computer

but ounce it is pack is it possible to unpack and save the texture file in the same folder than the blend file ?

Salutations

Yes.
File==> External data==> Unpack into files
or click on the package icon in the texture panel beside the file name.
There is a similar icon in the UV Editor window