i have an external HDD with all my files loaded on it. today i decided i needed to back up because i'd created a lot of new files on my PC. when i go to the briefcase i want to back up and click update all, i get this error message
http://i44.tinypic.com/243iwk6.jpg
how do i fix this?
http://i44.tinypic.com/243iwk6.jpg
how do i fix this?

My Computer
- Computer type
- PC/Desktop
- Computer Manufacturer/Model Number
- Custom build
- OS
- Windows 7 Home Premium 64-Bit
- CPU
- i5-4590
- Motherboard
- GIGABYTE H97M-HD3
- Memory
- Corsair DDR3 8GB
- Graphics Card(s)
- GeForce GTX 970
- Monitor(s) Displays
- LG Electronics W1942 - 19 inches
- Screen Resolution
- 1440x900
- Hard Drives
- Corsair Neutron SSD 119GB, Toshiba External 931GB
- PSU
- Corsair CX600
- Keyboard
- Logitech K360 Wireless
- Mouse
- Logitech Wireless Mouse M325
- Browser
- Firefox