The issue is now resolved. I opened a case with Microsoft, and we worked on it this morning. I am not entirely sure yet how this all related, but the tech I worked with was going to send me some blog info on it.... Apparently in SCCM 2012 R2 SP1, not sure if this applied to other versions, but this is my version..., Under Administration > Security > Accounts...
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You are limited to the number of accounts you can have. Each account takes up a certain amount of space, and you are allocated 32kb of space. I told the tech the time frame of the incident, then he saw the accounts, and I advised him that yes, those accounts were added after the last successful media creation. We had just created a bunch of new accounts because we were bringing in our DMZ to SCCM, and they are all untrusted domains, so we needed to make accounts for each domain. ended up being a lot... So we ended up removing a few accounts that we have not allocated anything for yet. There were 30 accounts in there. Once we removed the few accounts, the error went away and we were able to create media again.... Like I said, not sure how it relates yet, but I will be looking at the blog when he sends it to me... And I have talked to the techs in the DMZ about consolidating the accounts, because that was an abnormal amount of accounts they set up...