I also have my seeds written on paper and laminated it. Buried it underground enclosed in a waterproof capsule. Lamination for added protection, and buried underground to be fireproof. I also create several backups of my seeds on flash disks. Having both digital and tangible backups also help in case an unexpected thing happens.
I find you to be very careful how you store your seeds. Especially storing too digital backups. It is much safer and easier to check than it is to write down paper or bury it underground, as many people do. It avoids the destruction of time and other objective factors.