Ask HN: Backup/Archival options for large collections of Pictures and Video data

I recently took a trip to east Africa with a few friends of mine and within two weeks, we generated almost 250 GB worth of pics and videos (DSLRs and GoPros). I wanted to ask the HN community what are some of the good options to backup such kinds of data. As cameras get better, I'm finding it difficult to manage proper backups / archives of all the data.

I am considering Amazon Glacier with a syncing client but currently data is just replicated in multiple external HDDs.