Not disagreeing with the OP but "Hoarding information" is more commonly used to describe a much more insidious problem than just collecting so much information

Not disagreeing with the OP but "Hoarding information" is more commonly used to describe a much more insidious problem than just collecting so much information that it's a problem to keep track of it. "Information hoarding" is a problem when the hoarder keeps the information from other people. It happens a lot in dysfunctional work environments where "information is power" and where hoarders just keep important details to themselves, leaving others out of the loop to fend for themselves.