Household · official-source review · reviewed 2026-10-11
A backup plan is a list of items, and the gap is whatever is missing from that list.
Turn an item list and a copy size into the unprotected count, the copy time, and the share covered.
Households that keep photos, documents, and school work on devices and want a real backup picture.
Use the source document or official route that applies to your situation. This guide does not contact another person or verify external information.
Write one line per item: a phone, a laptop, a photo library, a document folder.
Tick only the items you can point to a copy of today.
Enter the gigabytes the unprotected items add. Use the real size from the device.
Enter a realistic megabytes per minute for your connection or drive.
Restore one file from a safe copy. A backup label does not prove the file comes back.
Twelve items with seven backed up leaves five unprotected, and 40 GB at 500 MB a minute is about 82 minutes.
Use your own source and details. The example is not a record about a real person or organization.
Two backup lists measured the same way. Both are examples.
Both cases are examples, not records about a real person. The bars show the same numbers the free App computes.
U.S. Cybersecurity and Infrastructure Security Agency · reviewed 2026-10-11
What this source supports: Select a backup method that fits the information, recovery need, and storage risk. Keep backups separate from the original data.
Source limit: A backup label does not prove that the files can be restored. Test a safe copy and follow the device or service instructions.
These sources support the statements above. They do not show that every person needs this guide. They do not show a specific result.
This guide counts items and estimates copy time from your numbers. It does not test that a copy can be restored.
A backup label does not prove that the files can be restored. Test a safe copy and follow the device or service instructions.
Use current instructions from the responsible organization. This guide is a planning aid, not an official decision or a substitute for qualified advice.
Turn an item list and a copy size into the unprotected count, the copy time, and the share covered.
This App counts and estimates from your numbers. It does not create a backup or prove a copy can be restored.
You enter every number yourself. The sources support the method and the limits. They do not produce a result for your specific case. Keep the original documents next to the sheet you build.
The App computes the worked example with your own numbers, in your browser.
APP 1
Turn an item list and a copy size into the unprotected count, the copy time, and the share covered.
Free · no account · no upload
Open Device Backup Hours and GapsThe App runs in this browser. It does not send or save entries. Copy, download, or print only when you choose.
This guide uses short, direct instructions as an ASD-STE100-style writing target. It is not a formal certification.
Companion App: Device Backup Hours and Gaps. It runs in this browser and does not upload your entries.
This guide is edited for clarity and checked against the sources it links. It is not a substitute for official instructions or qualified advice. A linked source does not show that every person needs this guide.