Transcend JetDrive™ 500/520/720/725 SSD not showing up in Disk Utility

Hi community,

I just purchased the Transcend JetDrive™ 500/520/720/725 Upgrade Kit. This should work for my MacBook Pro Retina Mid-2012 (MacBookPro10,1).

When I received the kit I installed the SSD in the external case as the manual states.

But then the drive doesnt show up in the DiskUtility. I can see it in System Information, that the USB device is recognised.

Also on the terminal I can see the USB device. But there is no way it shows up as a drive or within the DiskUtility.

I also replaced the current internal SSD and booted from an installer USB stick. When I want to install macOS Sierra and click on the DiskUtility, it is also not shown.

So I am pretty sure it is not a problem of the USB cable, USB port or USB/SATA Controller within the external case.

Anyone any idea on what to do here?

Thank you in advance!

MBP:~ user$ system_profiler SPUSBDataType

USB:

BRCM20702 Hub:

Product ID: 0x4500

Vendor ID: 0x0a5c (Broadcom Corp.)

Version: 1.00

Speed: Up to 12 Mb/sec

Manufacturer: Apple Inc.

Location ID: 0x1d181000 / 3

Current Available (mA): 500

Current Required (mA): 94

Extra Operating Current (mA): 0

Built-In: Yes

Bluetooth USB Host Controller:

Product ID: 0x8286

Vendor ID: 0x05ac (Apple Inc.)

Version: 1.54

Speed: Up to 12 Mb/sec

Manufacturer: Apple Inc.

Location ID: 0x1d181300 / 6

Current Available (mA): 500

Current Required (mA): 0

Extra Operating Current (mA): 0

Built-In: Yes

USB 3.0 Bus:

Host Controller Driver: AppleUSBXHCIPPT

PCI Device ID: 0x1e31

PCI Revision ID: 0x0004

PCI Vendor ID: 0x8086

Toms-MBP:~ tom$