I worked from Prudential for about five years. During that time I participated in their qualified plan they offered although I can’t remember what the plan was called. When I left I took my Prudential 401K rollover and rolled it over to and IRA that I self directed myself.
When you rollover money to an IRA, you want to make sure that you keep like kinds of money today. For example, you wouldn’t want to rollover 401k money into an IRA that had contributions in it that weren’t tax deductible. You have to keep that money separate from fully deductible contributions.
From an IRS standpoint this will make your plans easier to keep track of and won’t cause you problems down the road trying to sort it out. When in doubt, open a new IRA.