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.
Back. [ 1 2 Year Warranty] Avantree USB Bluetooth 4.0 Adapter for PC, Wireless Dongle, for Stereo Music, VOIP, Keyboard, Mouse, Support All Windows 10 8.1 8 7 XP vista. 2  Sabrent USB Bluetooth 4.0 Micro Adapter for PC [v4.0 Class 2 with Low Energy Technology] (BT-UB40) 4.5 out of 5 stars 34.