How do i transfer data from a xbox 360 hard drive to put data on a new xbox?(new xbox has no hard drive)?

Buying new xbox`

need to transfer data from a hard drive to the xbox memory without another hard driveHow do i transfer data from a xbox 360 hard drive to put data on a new xbox?(new xbox has no hard drive)?
To be honest, i got no idea but try using memory unit or usb that may work