As a customer of Storj, this isn't something you'll need to worry about. We're integrated with Stripe and take credit cards and invoices. We will also take STORJ token if you want.
If you are looking to provide storage space to the network as a storage node operator, then your nearest reputable exchange should do the trick.
If you are looking to provide storage space to the network as a storage node operator, then your nearest reputable exchange should do the trick.