---
title: "Check Your Storage: free tool to size data | Firevault"
description: "Find out how much data you have across your devices and cloud accounts before choosing an Offline Secure Storage® vault sized to last."
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---

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Overview

MobileDesktopCloudNext Steps

Storage guide 

# Check how much storage you actually use

Before choosing a vault, find out how much data you hold across your devices and cloud accounts. Your Offline Secure Storage® vault needs to last 3 years, so you need the full picture.

-   Mobile
-   Desktop
-   Cloud accounts

01 Mobile devices 

## Phones and tablets

Start with the devices you carry every day. Both Android and iOS report usage clearly in a few taps.

### Android Phones & Tablets

1.  1 Open Settings
2.  2 Tap Storage (or Battery and device care → Storage)
3.  3 View 'Used' and 'Available' at the top
4.  4 Tap categories to see what is taking space

Check both internal storage and any SD card separately.

### iPhones & iPads

1.  1 Open Settings → General → iPhone Storage
2.  2 Wait for the bar chart to load, it shows usage by category
3.  3 Scroll down to see per-app storage
4.  4 Note the total 'Used' figure at the top

Photos and Messages are usually the biggest consumers.

02 Computers and drives 

## Desktops, laptops and external drives

Check your primary machine, then every external drive, USB stick, and NAS used for backups.

### Windows PCs

1.  1 Open Settings → System → Storage
2.  2 View the usage bar for your main drive (C:)
3.  3 Click 'Show more categories' for a full breakdown
4.  4 Check additional drives in 'View storage usage on other drives'

Do not forget to check the Downloads and Desktop folders, they grow fast.

### Mac Computers

1.  1 Click the Apple menu → About This Mac
2.  2 Click Storage (or More Info → Storage on newer macOS)
3.  3 View the coloured bar showing what is using space
4.  4 Hover over each section for exact figures

System Data can be large, it includes caches and Time Machine snapshots.

### External Hard Drives

1.  1 Connect the drive to your computer
2.  2 Windows: Open File Explorer → right-click the drive → Properties
3.  3 Mac: Open Finder → right-click the drive → Get Info
4.  4 Note the 'Used' value

Check every external drive, USB stick, and NAS you use for backups.

03 Cloud services 

## Dropbox, iCloud, Google Drive and OneDrive

Cloud accounts are often the largest, and easiest to forget. Check each one you actively use.

### Dropbox

1.  1 Go to dropbox.com and sign in
2.  2 Click your avatar → Settings → Plan
3.  3 View 'Space used' at the top of the page

If you use Dropbox on multiple devices, check for 'Smart Sync' files that only exist in the cloud.

### iCloud

1.  1 iPhone/iPad: Settings → \[Your Name\] → iCloud → Manage Account Storage
2.  2 Mac: System Settings → Apple ID → iCloud → Manage
3.  3 View the coloured bar and per-app breakdown

iCloud backups of your devices can be surprisingly large.

### Google Drive

1.  1 Go to drive.google.com
2.  2 Click the Storage link in the left sidebar (or visit one.google.com/storage)
3.  3 View your total usage across Drive, Gmail, and Google Photos

Google Photos in 'Original quality' count against your quota.

### OneDrive

1.  1 Go to onedrive.com and sign in
2.  2 Click the gear icon → OneDrive Settings → More settings
3.  3 View 'Storage metrics' showing used vs available

If you use Microsoft 365, check both personal and work OneDrive accounts.

## Now add it all up

Total up the storage used across every device and cloud service. Then factor in growth, your vault needs to last **3 years**.

A good rule of thumb: take your current total and add 30 to 50 percent for 3 years of growth.

Find the right vault for you