. ReDigi’s upload process is a source of contention between the parties. ReDigi asserts that the process involves “migrating” a user’s file, packet by packet – “analogous to a train” – from the user’s computer to the Cloud Locker so that data does not exist in two places at any one time. Capitol asserts that, semantics aside, ReDigi’s upload process “necessarily involves copying” a file from the user’s computer to the Cloud Locker. Regardless, at the end of the process, the digital music file is located in the Cloud Locker and not on the user’s computer. Moreover, Media Manager deletes any additional copies of the file on the user’s computer and connected devices. Once uploaded, a digital music file undergoes a second analysis to verify eligibility. If ReDigi determines that the file has not been tampered with or offered for sale by another user, the file is stored in the Cloud Locker, and the user is given the option of simply storing and streaming the file for personal use or offering it for sale in ReDigi’s marketplace. If a user chooses to sell his digital music file, his access to the file is terminated and transferred to the new owner at the time of purchase.