I'd wish to upgrade my laptop's internal drive, and put the original one in an external enclosure to use it via USB. I could buy an 2.5" HDD and a 2.5" tray separately to accomplish this. However, this would cost more than buying a complete portable HDD and swap the two drives. Also, there are portable 4TB drives, while internal ones arrive to 2TB maximum.
I know that the great majority of portable drives are engineered to function as external disks only, having no SATA interface and the Micro-B USB directly (e.g. WD's My Passport and Elements). I wanted to know if anyone got to open a Maxtor STSHX-M401TCBM or a Samsung STSHX-M401TCB, or already knows for some reason exactly what's inside. Is there a SATA interface, or just the USB one?
Also, what's the difference between the two? Is the HDD inside the same Seagate, and the enclosure is made by Maxtor in one case and Samsung in the other? The enclosures look the same, apart from the brand written on it.