rich1.0npub12rrvutnfeu9677d4yjytypqccjn0njnm6zkx2j6xyn2uqfw02ldsrl8ty9https://nostr.now/npub12rrvutnfeu9677d4yjytypqccjn0njnm6zkx2j6xyn2uqfw02ldsrl8ty9njumphttps://nostr.nowVeraCrypt. You can then use EDS Lite app on your GrapheneOS phone to open them. To be honest i don't really recommend you doing any of that. Just get a second Pixel phone with GrapheneOS and use it as your backuo storage. You can use a USB-C cable to transfers files between them. Everything is encrypted by default and secured by hardware, unlike USB drives or MicroSD cards.