Various causes: There are very many causes, from congestive heart failure, to lymphedema, to venous insufficiency, blood clots, pregnancy, a various other causes, including serious and not-so-serious causes.
I have a Sony DVP ns55p blu-ray player with a usb port in the front. The player requires that the usb flash device (thumb drive) be formatted in FAT32in order to recognize it.
1 Orange/silver 1TB portable external hard drive is suitable for PC and MAC. 2  Interface: one USB 3.0 (USB 2.0 compatible) two FireWire 800 (9-pin) (FireWire 400 compatible), Transfer rate: 5 Gb/s USB 3.0, 800 Mbps FireWire 800.  Dimensions: 1H x 3.5W x 5.7D.