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.
The Zoom 4322 is a USB Bluetooth adapter that enables connection with Bluetooth-enabled devices like smartphones and tablets, as well as keyboards and mice. This Zoom adapter has the ability to wirelessly transfer up to 3 Mbps of data.