A:AnswerI think you have to use a 3rd party app to download you photo to your mac or pc and then copy them to this drive. I use a 3rd party app and save them to 2 separate external hard drives as a back up just in case because you never know when hard drives can fail.
A:AnswerYes, all storage devices are universal for Mac and PC. If Mac needs to format it differently it will. Don't get suckered into the extra "Made for Mac" for storage.
A:AnswerPer an internet search, the answer is
640 MBps
USB 3.0 (also known as SuperSpeed USB) has a maximum bandwidth rate of 5 gbps (gigabits per second). That translates to 640 MBps (megabytes per second)—ten times faster than USB 2.0 (aka Hi-Speed USB).May 24, 2013
However, there are other factors that might impact the speed such as the type of devices one is using.
Search the internet for transfer speed of USB 3.0 for more details.