Why Your Files Are Safe — If You Prepare
The number one fear people have about switching to Linux is losing everything: years of photos, documents, music, saved passwords. That fear is completely understandable — and completely preventable.
The good news is that modern Ubuntu handles your Windows files well. But the preparation you do before installation is what determines whether this goes smoothly or badly. Follow the steps below, and your files will be waiting for you on the other side.
Understand What You’re Actually Risking
Installing any operating system touches your hard drive. If something goes wrong — a power cut mid-install, a wrong click, a corrupted drive you didn’t know about — data can be lost.
There’s also a filesystem mismatch to understand. Linux uses a format called ext4 for its own partition. Windows can’t read ext4 at all. So if you set up a dual-boot system (both Windows and Ubuntu on the same computer), your Windows files are visible from Ubuntu, but your Linux files are invisible from Windows. That’s not a bug — it’s just how the two systems work.
The practical solution: back everything up before you start, and keep your important files in a place both systems can reach.
Step 1: Back Up Everything (This Is Non-Negotiable)
Before you touch your hard drive, copy your important files to an external location. Don’t skip this step, even if the installation goes perfectly.
What to back up:
- Documents, photos, music, videos — usually found in
C:\Users\YourName\ - Browser bookmarks (export to an HTML file in Chrome or Firefox, or enable Chrome sync)
- Email: if you use Gmail or Outlook.com, your mail is already in the cloud. If you use a desktop app like Thunderbird or Outlook, export your mail archive first.
- A written list of software you rely on — you’ll want to find Linux equivalents later
Where to back up:
- An external hard drive or large USB drive
- Cloud storage like Google Drive or OneDrive
Follow the 3-2-1 rule as a guide: three copies of your data, on two different types of media, with one stored somewhere other than your computer. That sounds like overkill until the day you actually need it.
Step 2: Check for BitLocker Encryption
This one catches many beginners off guard. BitLocker is Windows’ drive encryption feature, and if it’s active, the Ubuntu installer cannot resize your Windows partition. It will simply stop and tell you to disable it first.
Here’s the surprising part: Windows 11 may have turned BitLocker on automatically, even if you never asked it to. So check even if you’re sure you didn’t enable it.
To check and disable it: go to Control Panel → System and Security → BitLocker Drive Encryption. If it’s on, click “Turn off.” Windows will decrypt the drive — this can take a while, but you can keep using the computer while it works.
Step 3: Disable Fast Startup
Fast Startup makes Windows boot faster by saving a partial snapshot of your system when you shut down. The problem: this can leave your Windows drive in a locked state that prevents Ubuntu from reading it properly.
Turn it off here: Control Panel → Power Options → Choose what the power buttons do → Change settings that are currently unavailable → uncheck “Turn on fast startup” → Save changes.
Try Before You Commit
You don’t have to install anything to try Ubuntu. Download the Ubuntu ISO file, write it to a USB drive using a free tool called Rufus, and boot from that USB. You’ll see an option to “Try Ubuntu” — this runs the full system directly from the USB without touching your hard drive at all.
This is genuinely useful. You can check that your Wi-Fi works, that your screen looks right, and that you feel comfortable with the interface — all with zero risk.
Accessing Your Windows Files From Ubuntu
Once Ubuntu is installed, reading your Windows files is straightforward. Ubuntu includes built-in support for NTFS (the Windows file format), so your Windows partition shows up in the file manager just like any folder.
You can read, copy, and save files normally. One sensible habit: don’t use your Windows C: drive partition as your day-to-day storage from Linux. Instead, set up a separate folder or partition formatted as NTFS that both systems can read and write to. Think of it as a shared shelf that both operating systems can reach.
Set Up Backups in Ubuntu Right Away
Once you’re running Ubuntu, get a backup routine in place immediately — don’t wait for something to go wrong.
- Déjà Dup is built into Ubuntu and is the easiest starting point. It creates scheduled, encrypted backups of your home folder to an external drive or cloud storage. It’s straightforward enough for complete beginners.
- Timeshift protects your system itself — if a software update breaks something, you can roll back in minutes. Think of it as an undo button for your operating system.
Use both together. Timeshift protects Ubuntu. Déjà Dup protects your personal files. Neither replaces the other.
The Short Version
Switching to Linux doesn’t have to mean starting over. Your photos, documents, and files can come with you. The steps are:
- Back up to an external drive before you do anything else
- Disable BitLocker and Fast Startup in Windows
- Try Ubuntu from a USB before installing
- Access your Windows files through Ubuntu’s file manager
- Set up Déjà Dup and Timeshift on day one
Do those five things, and you’ll have very little to worry about.
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Practical migration tips, step-by-step tutorials and hardware recommendations in the book:
Ditch Windows – Embrace Linux
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