A backup is a copy of your current data, kept so you can restore it quickly after something goes wrong. An archive is older data moved into long-term storage, kept for years because a regulation, a lawsuit or your own policy requires it. People often use the terms interchangeably, but they solve different problems, and most businesses need both.

Here's what that looks like in real life.

"Our servers have been hacked. Please tell me you can help get our data back!"

Those were the first words Mike said when he called our office one afternoon. Someone at his firm had clicked a phishing email, and ransomware had locked up the firm's servers and data.

Fortunately, Mike's firm backed up and archived its servers to our data center. We recovered his data in about 15 minutes, and he didn't pay a cent of ransom. The attack still happened, but because the firm had both systems in place, it barely slowed them down.

What Is a Backup?

A backup is an exact copy of the files, systems or entire servers you use every day. Its job is recovery: when data is lost, you restore it from the most recent good copy and get back to work.

Data loss usually happens for ordinary reasons, not dramatic ones:

• Someone deletes or overwrites a file by mistake

• A hard drive or server fails

• Ransomware encrypts your files

• A laptop is lost or stolen

• A fire, flood or power surge damages equipment

Backups run on a schedule, often several times a day, and keep a set of recent versions. Because the goal is getting back up fast, backup storage is built for speed. The more often you back up, the less work you lose when something goes wrong.

What a backup isn't built for is keeping data for years. Older versions roll off as new ones come in, so a file deleted long ago may no longer be in your backups at all.

What Is File Archiving?

File archiving moves data you no longer use day to day out of your primary systems and into secure long-term storage. Its job is retention: keeping records intact, unchanged and searchable for as long as you're required to.

Businesses archive data for three main reasons:

• Compliance: Regulations require certain records to be kept for a set number of years.

• Legal: In a lawsuit, dispute or audit, you may need to produce old emails and documents.

• Storage: Moving old data off your servers frees up space and keeps everyday systems fast.

Archived data is rarely accessed, so archive storage is built for durability and search rather than speed. That's also why an archive can't replace a backup: it isn't designed to restore a whole server in minutes.

Backup vs. Archive: Key Differences

Why Your Business Needs Both

The easiest way to see the difference is to look at what each one can and can't save you from:

• Ransomware hits on a Tuesday morning. Your backup restores your servers to Monday night. An archive wouldn't help, because it doesn't hold your current files.

• An auditor asks for client emails from five years ago. Your archive finds them in a search. Your backups rolled those versions off long ago.

• You need a project folder a former employee deleted two years ago. Without an archive, it's probably gone for good.

• Your file server is running out of space. Archiving older files frees it up. Backing them up doesn't.

Backups protect your data today. Archives protect your records over time. Each one covers the situations the other can't.

Email Archiving vs. Email Backup

Email is where the difference matters most, because so much of a business's history lives in the inbox.

Many businesses assume Microsoft 365 keeps their email forever. By default, it doesn't. When someone empties their Deleted Items folder, Exchange Online keeps those messages in a hidden recovery folder for 14 days by default, and 30 days at most. After that, unless retention policies have been set up, the email is gone.

• Email backup copies your mailboxes so you can restore a deleted message, a folder or an entire mailbox after a mistake, an attack or a departing employee's "cleanup."

• Email archiving keeps a tamper-proof, searchable copy of every message sent and received, for as long as your retention rules require. It's what you rely on when a client dispute, a lawsuit or a regulator needs email from years back.

Microsoft 365 also has a feature called Online Archive, but it's mainly extra mailbox storage. On its own it isn't a backup, and it doesn't meet retention requirements unless retention policies are configured. If your business handles regulated or sensitive client communication, you need both a real email backup and a real email archive.

How Long Should Business Records Be Kept?

It depends on your industry and the type of record. Here are a few common examples:

The Pennsylvania rule shows why law firms need both. It requires trust account records to be kept for five years, and it also requires electronic records to be backed up to a separate storage device at the end of every day entries are made. That's archiving and backup in a single rule.

These are examples, not legal advice. Confirm your own requirements with your attorney, accountant or compliance officer. If you're not sure where your business stands, our Compliance as a Service team can help you map out what you need to keep and for how long.

Where Should You Store Backups and Archives?

Wherever your data lives, follow the 3-2-1 rule: three copies of your data, on two different types of storage, with one copy offsite. Our post on why backup redundancy matters explains how it works.

Physical media such as external hard drives are inexpensive, but they're easy to lose, overwrite or damage in a power surge or fire. They're often left plugged in, too, which means ransomware can reach them.

Cloud storage is safer, but the cloud is still someone else's data center. Before you trust a provider with your backups and archives, make sure you can answer these questions:

• Where is my data physically stored?

• Who can access it, and how is it protected from ransomware?

• How quickly can I get it back, and who do I call when I need it?

At EMCO, client backups and archives are stored in our local, secure data center, and we "back up your backup" in a second physical location so your data never depends on one site. When you need something back, you call a local team that knows your systems, not an anonymous support queue.

Backup and Archiving FAQs

Is an archive the same as a backup?

No. A backup is a copy of current data used to recover from loss. An archive is older data moved into long-term storage to meet retention requirements. Most businesses need both.

Can backups replace archiving?

Not reliably. Backups keep a rolling set of recent versions, and older versions are deleted as new ones come in. If you need a record from several years ago, it usually won't be there.

Is Microsoft 365 email backed up automatically?

Not the way most people expect. Deleted items can be recovered for 14 days by default (30 at most), and Microsoft's Online Archive is extra mailbox storage, not a backup. Longer protection takes a separate backup and archive.

How often should a business back up its data?

At least daily for most businesses, and more often for systems that change constantly, like file servers and accounting databases. The right schedule depends on how much work you could afford to redo.

Does archiving free up storage space?

Yes. Moving older, inactive files into an archive takes them off your primary servers, which frees up space and keeps everyday systems running smoothly.

Is Your Data Backed Up, Archived, or Neither?

Many businesses assume their data is protected until the day they need it back. Mike found out his was, in about 15 minutes.

EMCO Technology helps businesses throughout the Greater Philadelphia region set up backup, disaster recovery, and file and email archiving that work together, so nothing falls through the gaps. We'll review where your data lives, how it's backed up and how long it's kept, then recommend a setup that covers both recovery and retention.

For more on protecting your data, read our Business Backup FAQs, or schedule a free consultation with our team.

Backups get you back to work. Archives keep your records safe for the long haul.