The USB or the lightning cable you are using to connect iPhone with your PC might be faulty. You need to verify that and try connecting again after restarting the PC ...
Apple has posted a Knowledge Base article addressing an issue where users receive the error message: "Error -48 itunes unable to download your update at this time ...
If you own an iPhone, one of the easiest ways to secure your data is by backing it up to iCloud. You will most likely need to pay for additional iCloud real estate to accommodate your iPhone's full ...