cannot access external drives

[terribilita]

Hi,

 

I used to be able to access USB external drives via the USB ports, but suddenly that stopped working ... even after multiple reboots, I can't access the external drives ...

 

Any tips are much appreciated!

 

Cheers, 

 

Motherboard: Gigabyte UltraDurable Z97-HD3 (LGA 1150)

Audio Card: Realtek ALC 887 codec: High Def Audio: 2/4/5/1/7.1 channel; Support for S/PDIF Out

Graphics: NVIDA Geforce GTX 970 PCI-E 3.0/4GB GDDR 5/256 bit (Flex Display: 4 monitors: HDMI/Display Port 3)

Power Supply: Hydro G 650 W (Zero Noise: 0dB; full modular; for Intel Skylake)

Corsair Dual H60 Fans (Hydro Series; High-Performance Liquid CPU Cooler)

Memory: Corsair 4X8GB=32 GB DDR 3 Pro Series 1600MHZ

Corsair Graphite Series 780T Full-Tower PC Case

Asus 16X Blu-Ray Writer (M-Disk Support)

TP-Link 450 Mbps Wireless N Dual Band PCI Express Adapter (for 5GHz band or legacy 2.4GHz)

Samsung SSD 850 EVO 120 GB (3D V-Nand Technology)

Samsung 3TB Drive

Intel Skylake Core i7-4790K (Cores: 4, Threads: 8)

LG Ultra HD 4K Monitor 27UD68 cm/27

Magic Keyboard (MLA22ID/A

Magic Trackpad 2

 

Mac OSX El Capitan

 

Clover Version 2.3k rev. 3577

EFI Revision 2.31

 

 

Mac Book Pro, 13 inch (mid 2010)

Memory: 8GB Ram @1067 MHz DDR3

Graphics: NVIDIA GeForce 320M 256MB

HD: Samsung 1TB

Mac OSX Sierra

Sennheiser HD201