backward compatible
All major operating systems support USB devices.
It allows to use USB hot-swappable devices, the data transfer is not that bad, and supports huge number of devices.
Any USB devices as long as the computer has USB Ports. Plugging new USB devices in old computers (older than 3-5 years) might not work as newer devices might use a newer USB version. Generally this rarely happens, I never had an issue of a USB device not working on a computer with USB.
Both an iOS or Android device supports a USB port, but only Android devices have a slot for a microSD card.
Most USB hard disk drives, mp3 players, digital cameras, flash card readers, cellphones and other USB digital storage devices. If it can be plugged into a PC via USB and recognized as a storage device by the PC, it will be recognized by USB Host Play devices as well. Files that can be played back depends on what your USB Host Play device supports. Most will play back JPG and MP3 at the very least. Others can play MP4, DivX, WMA, WMV files also.
That depends on the type of device you actually want. Many new USB devices these days support USB 2.0. It should say on the package whether or not it supports USB 2.0.
In theory a single hub of USB can support 127 devices. In practice, this will not actually occur. Most computers do not have enough power to drive that many devices. A reasonable number would be about 20.
yes but usb 2.0 devices dont work on usb 1x
usb 2.0 can support 127 devices
no they are storage device
Most computers have USB 2.0 built into them.Some older computers have USB 1.1, but it isn't very common these days. USB 2.0 is backwards compatible with USB 1.1, so USB 2.0 devices will work with USB 1.1 ports. However, if you use a USB 2.0 Device with a USB 1.1 port, the device will only operate at USB 1.1 speed in that port.
yes