You are right in that I was little explicit. Let us talk about a private persons need and let us stay at the comparison with CDs as they were available in the 9

You are right in that I was little explicit. Let us talk about a private persons need and let us stay at the comparison with CDs as they were available in the 90ies. In another reply I derived today's needed disk size as 1-10TB. Let us also say that the access time should suffice to be able to watch a 4k resolved movie. You say archiving suggests durability and CDs may not have the same durability as tape storages. However I would say that a cheap price would compensate a possible lack of durability, because one could easily duplicate or restore important data.