Access is about who can use something and how

Access in technology means the ability to reach, open, or use a device, program, file, website, or service. It describes both permission (whether you are allowed) and capability (whether you physically can). When someone says a file is "not accessible," they might mean you do not have permission to open it, or the program that reads it is not installed, or your internet connection is too slow to load it.

Access works on multiple levels. Your phone has a lock screen that controls who can turn it on. Inside the phone, individual apps have settings that control who sees your photos. A website might require a password. A document might be read-only, meaning you can view it but not change it. Understanding what kind of access you have — and what kind others have to your information — is part of using technology safely.

Key Takeaways

  • Access means both permission to use something and the technical ability to reach it.
  • Devices, apps, files, and websites all have separate access controls that work independently.
  • You can grant access to others in different ways: read-only, edit, or full control.
  • Checking who has access to your accounts and files is a basic security habit.

Permission-based access: who is allowed

Permission-based access is about rules that say who can do what. On your computer, the owner account has full permission to install programs and change settings. A guest account might only be able to use existing programs and save files to a specific folder. On a shared document like a Google Doc, you can give one person "view only" permission, another person "comment" permission, and a third person "edit" permission — all in the same file.

Social media platforms use permission-based access to control what you see. Your Instagram account might be private, meaning only people you approve can follow you and see your posts. A public account means anyone can see your posts without permission. Email works the same way: only people you have shared your email address with can send you messages, and only you can read the messages in your inbox.

Technical access: whether you can actually reach it

Technical access is different from permission. You might have permission to view a file, but if the program that opens it is not installed on your device, you cannot access it. You might have permission to visit a website, but if your internet is down, you cannot access it. A file might be stored on a server that is temporarily offline, making it technically unreachable even though you have permission.

Device compatibility is a common technical access issue. A file saved in a newer version of Microsoft Word might not open in an older version. An app designed for iPhones will not run on an Android phone. A website built for desktop browsers might not display correctly on a phone. These are all technical access problems — the permission exists, but the technology does not match.

How to check who has access to your accounts

Most online services let you see which devices and people have access to your account. On Google, you can visit myaccount.google.com and look for "Security" or "Your devices" to see which phones, tablets, and computers are signed in. You can sign out of devices remotely from there. On Facebook, the Settings menu has a "Where you are logged in" section that shows active sessions.

For email, check the "Connected apps and sites" or "App passwords" section. Many services let third-party apps (like your calendar app or password manager) access your email, and you should review that list regularly. If you see a device or location you do not recognize, you can revoke access immediately. This is one of the fastest ways to protect yourself if your password has been compromised.

Shared files and folder access

When you share a file or folder with someone, you choose what they can do with it. In Google Drive, OneDrive, or Dropbox, you can share a link and decide whether the recipient can view only, comment, or edit. You can also set an expiration date so the link stops working after a certain date. Some services let you require a password for the shared link.

Shared folders work the same way. If you create a folder and share it with your team, you can give some people edit access and others view-only access. Changes made by anyone with edit access show up for everyone else. If you remove someone from the shared folder, they lose access immediately — they cannot see new files added after that point, though they may have already downloaded copies of old files.

Public versus private access

Public access means anyone on the internet can find and use something without permission. A public YouTube video can be watched by anyone. A public GitHub code repository can be viewed and downloaded by anyone. Public access does not mean you lose control — you can still delete the content, change the description, or switch it to private at any time.

Private access means only people you specifically invite can see or use something. A private Spotify playlist is visible only to you unless you share the link with someone. A private GitHub repository can only be accessed by people you have added as collaborators. Private does not mean secret — it just means you control the list of who can access it.

Frequently Asked Questions

What does it mean when a file says "access denied"?

It usually means you do not have permission to open that file, or the program that reads it is not installed. If it is your own file, you might need to change the permissions in the file's properties. If it is someone else's file, you need to ask them to give you permission or send you a copy.

Can I revoke access after I have shared something with someone?

Yes. In Google Drive, OneDrive, and most cloud services, you can click the share button again, find the person's name, and click the X or "Remove" next to it. They lose access immediately. If they already downloaded a copy, they will still have that copy on their device.

What is the difference between "view only" and "comment only" access?

View-only means the person can read the file but cannot make any changes or add comments. Comment-only means they can read it and add comments, but cannot edit the actual content. Edit access means they can change the file itself.

Why does my app ask for permission to access my camera or location?

Apps ask for permission because they need your approval before they can use those features. You can usually change these permissions in your phone's settings under the app's name. Denying permission means the app cannot use that feature, even if it was designed to.

If I change my password, do I lose access to my own account?

No. Changing your password signs you out of all devices, but you can sign back in immediately with the new password. This is actually a security feature — if someone else knew your old password, they lose access when you change it.