If you’re managing financial records, employment contracts, or other legal-binding documents, a password protecting folder could help keep your data secure. Even if a device is lost, stolen, or if a file is accidentally shared via email or cloud link, the contents remain inaccessible without the correct credentials.
But, beware: Password protecting a folder is different on every operating system and security architectures vary across platforms. Some systems offer robust native encryption, while others require workarounds that may be lost if those files are moved to the cloud.
In this guide, we explain how folder protection works across Windows, macOS, Android, and Proton Drive, including how to securely share encrypted folders with password-protected access.
How to password protect a folder in Proton Drive
Proton Drive protects files and folders with end-to-end encryption by default. You can also add password protection to shared links for an additional layer of access control when sharing sensitive files externally.
1. Sign in at drive.proton.me(jendela baru)
2. Click the Manage share icon on the file you wish to password protect.
3. Toggle the public link to Active, then click Set password or expiration date.
4. Toggle Require password on, then enter your password in the field.
5. Click Save changes.
How to password protect a folder in Windows 11
Often referred to as password protection, Windows actually uses built-in folder encryption using the Encrypting File System (EFS), available on certain versions such as Pro and Enterprise.
- Right-click the folder you want to encrypt, then select Properties.
- Under the General tab, click Advanced.
- Check Encrypt contents to secure data.
Important note: You might see a prompt to back up your encryption key. Do this. If you ever switch computers or lose access to your account, that key is the only way to get your files back.
The folder is now encrypted and linked to your Windows user profile.
Windows’ built-in encryption is good for locking files on your own computer, but it doesn’t work well for sharing folders with your team or outside partners. If you need to securely share encrypted folders with other people, you can upload them to Proton Drive and add password protection to the sharing link.
How to password protect a folder on Mac
macOS lets you password protect folders, but the process has more steps than Windows.
- Open Finder and click Applications
- Open the Utilities folder, then click Disk Utility.
- In the nav bar, click File → New Image → Image from Folder.
- Select the folder you want to password protect and click Choose.
- Enter a name, then choose an encryption strength. AES-128 is considered secure for everyday use. AES-256 uses a longer encryption key and is typically recommended for highly sensitive business or legal data.
- Click Save.
The folder is now converted into an encrypted file on your Mac.
While this keeps your files safe on your macOS device, sharing encrypted folders with other people usually involves sending both the encrypted file and the password separately, which creates a risk of one getting lost or intercepted.
If you need to securely share encrypted folders across devices or with other people, you can upload the encrypted file to Proton Drive and add password protection to the sharing link.
How to password protect a folder with Android
Android doesn’t offer a standard way to password protect folders. Some devices include a secure or “safe” folder feature that lets you store files behind a PIN, pattern, or biometric lock.
If your device supports it, you can move files into a secure folder using your file manager app. The exact steps vary depending on your device and manufacturer.
Files stored this way stay private on your device, but sharing them is not straightforward and doesn’t create a password-protected folder you can send to others. If you need to securely share files from Android, you can upload them to Proton Drive using the Android app and add password protection to the sharing link.
1. Open the Proton Drive app.
2. Tap the three vertical buttons next to the file you want to password protect.
3. Tap Manage access
4. Toggle Share with anyone and tap Link settings
6. Toggle Password protection and add your password.
7. Tap Save.
When password protecting a folder becomes ineffective
Windows links encryption to a user profile, macOS requires managing files and passwords separately, and Android lacks native secure sharing for encrypted folders. While cloud services simplify sharing, many don’t offer true password-protected access or end-to-end encryption.
| Method | Works on your device | Works when sharing |
| Windows encryption | Yes | No |
| macOS disk image | Yes | Limited |
| Android/iOS folders | Limited | No |
| Google Drive | Yes | Limited |
| Proton Drive | Yes | Yes |
Businesses feel the limitations of password protecting at folder-level when:
- Teams waste time manually sending passwords via email or chat while trying to share a single encrypted folder.
- Auditors flag files that were “protected” on a laptop but became accessible the moment they were uploaded to a shared cloud drive because the encryption didn’t travel with the data.
- Former employees or contractors still have access to a shared device and can bypass folder locks that were tied to a specific user profile, leaving sensitive HR or financial data exposed.
- Field agents or remote workers can’t securely access or share encrypted folders on Android or iOS because the native tools simply don’t support cross-device sharing.
A better way to share sensitive business data
If you need to share encrypted folders across devices or with other people, you can upload the encrypted file to Proton Drive and add password protection to the sharing link. Proton Drive lets businesses securely share password-protected folders across teams, devices, and external partners without removing encryption or relying on separate file-sharing tools.
With Proton Drive, you can:
- Share securely without the hassle: Generate encrypted links for specific folders and set a password for access. No more sending passwords via insecure channels or worrying about files decrypting automatically on shared devices.
- Maintain control everywhere: End-to-end encryption ensures that only intended recipients can view contracts, financial records, or customer data. Even if a link is forwarded, the content remains inaccessible without the password.
- Unify your security stack: Proton Drive fits into a broader privacy ecosystem. Pair it with Proton Mail for encrypted email communication, Proton Pass for secure credential management, and Proton VPN for safe network connections(jendela baru), giving your business a single, cohesive layer of protection for files, emails, and logins.
Learn more about secure file sharing with Proton Drive and create a free account to start protecting sensitive folders across your organization.
Frequently asked questions
Can password-protected folders help protect customer data?
Password-protected folders can help reduce unauthorized access to customer records, contracts, financial documents, and other sensitive business files stored locally. Additional protections such as encrypted sharing, access controls, and multi-factor authentication are still important when files need to be shared across teams or external partners.
Is password protecting a folder enough for business security?
Password protection adds an additional layer of security, but businesses should also use encrypted storage, strong account passwords, multi-factor authentication, and access controls to help protect sensitive information.
What’s the safest way to share confidential business files?
Encrypted cloud storage with password-protected sharing links and access controls is generally safer than sending files and passwords separately through email or messaging apps.
Can teams securely share password-protected folders across devices?
Built-in operating system encryption tools are often designed for local file protection rather than collaboration across multiple users or devices. Secure cloud storage services with encrypted sharing are usually more practical for teams.
Why do businesses use encrypted file sharing?
Encrypted file sharing helps businesses reduce the risk of sensitive files being exposed during collaboration, remote work, or external sharing with clients, contractors, and partners.
What types of business files should be password protected?
Businesses commonly protect folders containing HR records, legal documents, financial reports, contracts, customer information, internal communications, and confidential project files.
