A:AnswerYes but with just this cable it can only be through speakers or bluetooth, not wired buds/headphones. Adapters do exist that can be added to use wired buds/headphones.
A:AnswerYes you can... however this cord won’t connect directly to the SD card or the Samsung phone... however with software(or the iOS transfer app) you can transfer them
A:AnswerMake sure that your charging cord is MFI certified. Some off brands simply don’t work well.
The other possibility is that your cord has broken simply due to wear and tear during normal usage.