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This scenario covers extended internet or power outages — whether from infrastructure failure, natural disaster, or deliberate disruption. The goal is to remain functional without cloud access or continuous power.

== The problem ==

When power or internet goes down:
* Cloud storage becomes inaccessible (Google Drive, iCloud, OneDrive)
* Contactless payments fail; ATMs may go offline
* Devices relying on cloud sync stop working
* Communication apps that require a data connection go silent

== Data: have a local copy ==

The most important step is done in [[Data backup]]: get everything off the cloud and onto a local drive before you need it. An encrypted external hard drive with your photos, documents, contacts and passwords works without any network connection.

== Power ==

=== Short outages (hours) ===
* Power banks for phones and small devices
* UPS (Uninterruptible Power Supply) for routers and NAS devices

=== Extended outages (days–weeks) ===
* Portable solar panels + battery station (e.g. Jackery, EcoFlow)
* Car charger adapters
* Goal: keep phone, laptop, and a local server running

== Communication ==

* '''Signal / DeltaChat''' — work over any data connection including mobile
* '''Walkie-talkies''' — no infrastructure needed, useful within a few km
* '''Offline mesh apps''' — Meshtastic (LoRa radio), Briar (Bluetooth/WiFi direct)

== Maps ==

Download offline maps before you need them:
* [https://osmand.net OsmAnd] — detailed offline maps using OpenStreetMap data
* [https://maps.apple.com Apple Maps] — offline map download per region
* Google Maps offline — download regions in the app

== Money ==

* Keep some '''cash''' on hand — card payments and ATMs can fail
* '''Hardware wallets''' (Ledger, Trezor) for cryptocurrency holdings if relevant
* Physical documents of important account numbers

== Storage ==

* '''Encrypted external drives''' — local copies of all important data
* '''Distributed storage''' — copies at different physical locations
* '''Printed documents''' — last resort for truly critical information (IDs, insurance, key contacts)

== Medical & safety ==

* Physical copies of prescriptions and medical records
* Offline first aid guides (downloaded PDF or printed)
* Emergency contact list printed and stored at home

== Checklist ==

{| class="wikitable"
! Item !! Status
|-
| Local backup of all personal data || [[Data backup|See backup guide]]
|-
| Encrypted external drive ||
|-
| Second copy at another location ||
|-
| Offline maps downloaded ||
|-
| Power bank / solar backup ||
|-
| Walkie-talkies ||
|-
| Cash reserve ||
|-
| Printed emergency contacts ||
|-
| Offline copies of key documents ||
|}

== Next steps ==
* [[Geopolitics scenario]] — internet is up but US services are unavailable
* [[Self-hosted alternatives]] — services that keep working from your own infrastructure

Offline preparedness - Revision history

Admin: Initial content from noodpakket.tech