Newbie help how to store and backup iTunes library


It must be an age thing--pushing sixty and I can't make heads or tails out of the advice on the Computer Audiophile site. I just want to move my iTunes library from the internal hard drive on my Sony Vaio laptop to an external hard drive, and simultaneously back it up on another hard drive. I would like for the external drives each to have at least 3 TB of storage. I would like for them to be linked so that the backup drive regularly and automatically updates. And I'd like the drives to work with a Mac Mini, which I'm thinking about buying to use as a music server. If you can recommend specific hardware, I'd appreciate it. Or if I'm going about the storage-and-backup the wrong way, please set me straight. Thanks.
jhold
Rdavwhitaker's warning about the different formats required for MAC and PC is useful and his advice is good. If the OP wants to understand why it matters and what to do if he takes it on himself, there is a clear and easy-to-read explanation on this page by Matt Neuberg.
Above still a little fuzzy to myself. Can itunes be backed up in the cloud. Such as itunes, icloud?
iTunes, or any any other data, can be backed up to iCloud. Just remember, though, that Apple only gives you 5 gigabytes for free; if you need more space than that you'll have to pay for it. Also, backup will only be as fast as the upload speed of your Internet connection. For most consumer connections, the upload speed is pretty slow, meaning that first backup can take a long time.

David