Cloud backup stores your files on a company's servers instead of only on your computer or phone
Cloud backup is a service where you send copies of your files—photos, documents, videos, financial records—to servers owned and managed by a company like Google, Apple, Microsoft, or a third-party provider. Those files stay there even if your device breaks, gets stolen, or fails. When you need them back, you read them to a new device or restore them to the original one.
The main reason people use cloud backup is protection against loss. A hard drive failure, water damage, theft, or ransomware attack can wipe out everything on your computer. A cloud copy means you have a second copy somewhere else. It also lets you access your files from any device with internet—your phone, tablet, work computer, or a borrowed laptop.
Cloud backup is different from cloud storage. Storage (like Dropbox or Google Drive) is meant for files you actively use and share. Backup is meant for files you want to keep safe but may not need often. Some services do both, but the backup function is specifically about having a copy you can restore if something goes wrong.
Key Takeaways
- Cloud backup creates a copy of your files on a company's servers, protecting you if your device fails, gets stolen, or is damaged.
- Most cloud backup services charge a monthly or yearly fee, typically between $5 and $20 per month for unlimited storage on one device, though prices vary by provider and plan.
- Backup speed depends on your internet connection and how much data you have; initial backups can take days or weeks if you have hundreds of gigabytes.
- You should verify what happens to your files if you stop paying—some services delete them after a grace period, while others keep them for longer.
- Cloud backup works best alongside local backup (an external hard drive) because internet outages or service shutdowns won't leave you without a copy.
What gets backed up and what doesn't
Most cloud backup services back up your documents, photos, videos, and settings files. They typically do not back up the operating system itself (Windows, macOS, iOS) or large installed programs like Adobe Creative Suite or Microsoft Office. When you restore from backup, you usually have to reinstall the operating system and programs, then restore your personal files on top of that.
Some services let you choose which folders to back up—your Documents folder, Desktop, Downloads, and Pictures, for example. Others back up everything except system files. A few (like Backblaze or Carbonite) back up nearly everything on your device, including program files, which makes restoration faster but takes much longer to upload initially.
Check what the service excludes before you sign up. If you have large video files, music libraries, or specialized work files, confirm the service will back them up. Some services exclude certain file types or have limits on how much you can back up per day.
Cost and storage limits
Pricing varies widely. Some services charge per device: $10 to $15 per month for one computer, with discounts if you pay yearly. Others charge per person or per household and let you back up multiple devices under one account. A few offer unlimited storage for a flat fee; others limit you to 1 TB or 2 TB per year.
Free tiers exist but are usually limited. Google Photos offers free backup for photos and videos (compressed), but only up to 15 GB total across all Google services. Apple iCloud offers 5 GB free, then charges $0.99 per month for 50 GB or $2.99 per month for 200 GB. Microsoft OneDrive includes 5 GB free with a Microsoft account, then charges for more.
If you have a lot of data—500 GB or more—unlimited plans often cost less over time than tiered plans. But read the fine print: some "unlimited" plans have daily upload caps or exclude certain file types from the unlimited offer.
How long backups take and what affects speed
Your first backup is the slowest. If you have 200 GB of files and a 10 Mbps internet connection, the initial backup could take 10 to 20 days of continuous uploading. Most services run backups in the background, so you can use your computer while it happens, but it will slow down your internet and your device.
After the first backup, the service only uploads new files and changes to existing files. These incremental backups are much faster—usually minutes to an hour, depending on how much changed since the last backup. But if you have a slow internet connection or a lot of files change daily, even incremental backups can take hours.
Some services let you throttle upload speed so backups don't clog your internet. Others let you schedule backups for specific times—overnight, for example, when you are not using your connection. If you have very large files or a slow connection, ask the provider whether they offer a local backup option (you send them a hard drive, they copy it and send it back) to speed up the first backup.
Security and privacy considerations
Your files are encrypted in transit (while traveling to the company's servers) on most services. But whether they are encrypted on the servers themselves—so the company cannot read them—varies. This is called end-to-end encryption or zero-knowledge encryption.
Services like Backblaze, Carbonite, and Sync.com use end-to-end encryption, meaning only you have the key to decrypt your files. The company stores them encrypted and cannot access them even if a hacker breaks in. Other services like Google Drive and Microsoft OneDrive encrypt files on their servers but keep the encryption keys themselves, so technically they could read your files if law enforcement asked or if they were hacked.
If you store sensitive documents—tax returns, medical records, financial statements—check whether the service uses end-to-end encryption. If privacy is your main concern, a service with zero-knowledge encryption costs more but gives you stronger protection. If convenience matters more, a service like Google or Microsoft may be fine, especially if you are not storing highly sensitive information.
What happens if the company shuts down or you stop paying
Most services give you a grace period—usually 30 to 90 days—to read your files or pay your bill before they delete your backup. Read the terms of service to find out what that period is for the specific service you are considering.
If a company shuts down suddenly, you may lose access to your files. This is rare for large companies like Google, Apple, and Microsoft, but it has happened to smaller backup services. One way to reduce this risk is to use a service that is part of a larger company or has been in business for many years.
Another protection is to not rely on cloud backup alone. Keep a local backup on an external hard drive as well. That way, if the cloud service fails or you cannot afford the subscription, you still have a copy of your files at home.
Cloud backup versus local backup versus both
A local backup is a copy on an external hard drive or USB drive in your home or office. It is fast to restore from, does not depend on internet, and has no monthly cost. The downside is that if your house floods, burns down, or is robbed, you lose both your computer and the backup.
Cloud backup protects against physical disasters and theft but depends on internet access and a company staying in business. It is also slower to restore large amounts of data if your internet is slow.
The safest approach is both: a local backup for speed and reliability, and a cloud backup for protection against disasters and theft. You can set up a local backup with built-in tools (Time Machine on Mac, File History on Windows) for free, then add a cloud service for the extra layer of protection. This costs money only for the cloud service, not the local backup.
Frequently Asked Questions
Can I restore just one file or do I have to restore everything?
Most services let you restore individual files or folders. You log into the backup service's website or app, browse your backup, and read the specific file you need. Some services also let you restore to a specific date if you accidentally deleted something weeks ago and want an older version back.
What if my internet goes down during a backup?
Most services pause the backup and resume it when your internet comes back. They do not start over from the beginning each time. However, if you have frequent outages, backups will take longer overall, and you may want to consider a local backup as your primary protection.
Do I need cloud backup if I use cloud storage like Google Drive or Dropbox?
Cloud storage and backup serve different purposes. Storage is for files you use regularly and want to sync across devices. Backup is for protection if your device fails. You could lose files from storage if you accidentally delete them and they sync across all your devices. A backup keeps a copy even if you delete the original. Many people use both.
How do I know if a cloud backup service is trustworthy?
Look for services that have been in business for several years, are owned by established companies, and publish a privacy policy explaining how they handle your data. Read recent reviews from tech publications and user reviews on sites like Trustpilot. Avoid services that make guarantees about never losing data—no service can promise that.
Can I back up my phone to the cloud?
Yes. iPhones back up to iCloud, Android phones back up to Google Drive, and most cloud backup services offer mobile apps. Phone backups typically include photos, contacts, messages, and app data, but not the apps themselves—those reinstall from the app store when you restore.