Good question, and already quite a few useful answers! I think it is important to differentiate between storage and archiving. Unfortunately web storage media and hard drives seem not to be designed for long-term storage (decades or centuries!). Hard-drive storage facilitates quick retrieval and eventual change of data, but this is not needed for (digital) archives! As said in a former comment, petroglyphs are probably best, but blueray seems to be the only available commercial product right now - we are still waiting for the holographic crystal storing Terabytes for ever and unchangeable in 1cm3! I think memory institutions (museums, and for bioacoustics eventually Natural History Museums) would be the best place to tackle this task, which is far beyond the capacity of individual researchers and/or universities.

Good question, and already quite a few useful answers! I think it is important to differentiate between storage and archiving. Unfortunately web storage media and hard drives seem not to be designed for long-term storage (decades or centuries!). Hard-drive storage facilitates quick retrieval and eventual change of data, but this is not needed for (digital) archives! As said in a former comment, petroglyphs are probably best, but Blu-ray seems to be the only available commercial product right now - we are still waiting for the holographic crystal storing Terabytes for ever and unchangeable in 1cm3! I think memory institutions (museums, and for bioacoustics eventually Natural History Museums) would be the best place to tackle this task, which is far beyond the capacity of individual researchers and/or universities.