Ok, this scenario is a little confusing for me so here goes!!! I have an iPad Air 2 and an iPhone 6. Both share my own icloud account for back ups and I have 25gb still left in my cloud. My son, has an iPod Touch and he has his own icloud account, however he only has the free option - so he only gets 5gb worth of storage in his cloud. He has no credit card associated on his account - he buys vouchers, which he redeems on his device to buy stuff. My question is this : As I have 25gb left on my icloud account and he has actually run out of storage in his cloud, how would I go about backing up his iPod Touch in my cloud (if this is even possible), seeing that we both have 2 different icloud logins?