Honestly: - in a physical photo book. This forces me to be more selective, so only the best pics are printed (less than 300 pics) - their digital counterparts

Honestly: - in a physical photo book. This forces me to be more selective, so only the best pics are printed (less than 300 pics) - their digital counterparts are backed up in: one pendrive, one hard drive, one cloud provider. I update the backups every 6 months or so I have no idea if the digital pictures will be accessible in 30 years, so I try to keep myself up-to-date regarding this topic (every 5 years or so). It's not very difficult to migrate a few hundred pics to a new kind of storage system/format.