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A data safe is a fire-resistant safe built to keep its interior much cooler, and usually drier, than a standard document fire safe. That matters because paper survives at temperatures that would ruin hard drives, USB sticks, memory cards and film. A safe rated to protect paper for two hours may still let the inside get hot enough to destroy a backup drive, so if you store digital media you need a safe or insert rated for data.
This article explains why the two types are tested differently, how to read a data rating and how a data safe fits into a sensible backup plan. It is part of our fire-resistant safe buying guide, which covers every type of fire protection we sell.
Why Paper and Digital Media Need Different Fire Protection
Paper is surprisingly tough. It can sit in a hot, sealed space for some time without losing the information printed on it, as long as it does not char or ignite. Fire test standards for documents allow the inside of the safe to get very hot for that reason.
Digital and magnetic media are far more sensitive. Plastics soften and warp, adhesives fail, magnetic coatings degrade and electronics can be damaged by heat and moisture at temperatures well below where paper starts to suffer. Humidity is a second problem: many fire insulation materials release moisture as they heat, which protects paper but can harm electronics and photographs.
The test standards spell out the gap clearly.
| Standard and class | Intended for | Interior limit |
|---|---|---|
| NT Fire 017 Paper | Media that do not lose information below 170°C (normal paper) | Rise of no more than 150°C |
| NT Fire 017 Data | Normal magnetic media, safe below 70°C | Rise of no more than 50°C |
| NT Fire 017 Diskette | More sensitive media, safe below 50°C | Rise of no more than 30°C |
| UL 72 Class 350 | Paper records | 350°F (177°C) |
| UL 72 Class 150 | Paper, magnetic tape and photographic records | 150°F (66°C), plus a humidity limit |
| UL 72 Class 125 | Also flexible computer disks | 125°F (52°C), plus a humidity limit |
Sources: the Nordtest NT Fire 017 method and the published scope of UL 72. The minutes, such as 60 or 120, are separate from the class. Our article on what the minutes on a fire rating mean explains how to read them.
What Makes a Data Safe Different
A data safe uses more insulation, better door seals and often a second insulated compartment inside the main body. The aim is to slow heat and moisture so that the inner chamber stays under the tighter limit for the full rated time. That extra insulation is why data safes are heavier and more expensive than document safes with the same external size and fewer litres inside.
Examples from our range show how this is done:
- The Chubb DataGuard NT 40 is listed as certified to NT Fire 017 – 120 Diskette, the strictest class in that method, and carries a 120-minute rating. It sits from around $3,199 in our range.
- The Guardall Data Safe GDF DT2825EH uses an insulated inner cavity for data and is rated for 120 minutes, from around $3,412.
- The Chubb DataPlus+ range is listed as tested to UL 72 and certified by ECB•S to EN 1047-1 for data media for up to two hours, and adds burglary protection. Size 1 starts from around $9,899.
Prices come from our current catalogue and change over time, so check the product page before you buy.
Data inserts: an option for existing cabinets
If your office already uses fire-resistant filing cabinets, a data insert can be a cost-effective upgrade. The Guardall data insert for fire-resistant filing cabinets sits inside a drawer and provides a separate insulated compartment for media, listed with a 60-minute rating, from around $853. Inserts are designed for specific cabinets, so match the insert to the cabinet model.
Can You Store Paper in a Data Safe?
Yes. A safe that keeps media cool will also keep paper cool, so a data safe protects both. The reverse is not true. If your household or business has a mix of documents and drives, the simplest answer is a data-rated safe large enough for both, or a document safe with a data insert.
A data safe is not automatically a burglary safe, though. Many fire-focused units have modest burglary protection. If you also store cash or jewellery, our article on choosing between a fireproof and a high-security safe explains how to balance the two, and our office safes range includes models with both fire and cash ratings.
A Data Safe Is One Part of a Backup Plan
A data safe protects the copy you keep on site. It should not be your only copy. A widely used rule of thumb is to keep three copies of important data, on at least two different types of storage, with one copy kept off site. A practical version looks like this:
- Working copy: on your computer or server.
- Local backup: on an external drive kept in a data-rated safe, so it survives a fire and is fast to restore from.
- Off-site copy: in a reputable cloud service or a drive stored at another location and rotated regularly.
The ATO’s own guidance on digital record keeping lists using cloud storage to keep records safe from flood, fire or theft as one of the advantages of digital records. For businesses with tax records to keep, our guide to protecting business records from fire covers retention periods and storage options.
Tips for storing drives in a data safe
- Close the door fully every time. Fire tests are carried out with the door shut, and seals only work when they are closed.
- Check your drive manufacturer’s storage temperature range, and choose a safe class with a limit below it.
- Keep the safe away from heaters and direct sunlight so normal room heat does not build up inside.
- Rotate backup drives so the one in the safe is recent.
- Do not overfill. Drives jammed against the door can stop it sealing.
Humidity matters in daily use too. Fire insulation can hold moisture, and our article on how fire safes handle water and humidity explains how to keep the inside dry. Because many data safes are compact and lighter than burglary safes, we also recommend having yours installed and bolted down by our team.
Frequently Asked Questions
What temperature damages hard drives and USB sticks in a fire?
It varies by device, and test standards do not test every type of media. As a guide, NT Fire 017 treats normal magnetic media as safe below 70°C and more sensitive media as safe below 50°C, while UL 72 data classes limit the interior to 66°C or 52°C. Check your device’s storage temperature specification and choose a safe class below it.
Is a data safe worth it if I back up to the cloud?
Often, yes. Cloud storage protects against fire but can be slow to restore large volumes, and accounts can be locked or lost. A local backup drive in a data-rated safe gives you a fast, independent copy. Many businesses use both, keeping one copy on site in a data safe and another off site.
Can I put a USB stick in my document fire safe?
You can, but a paper-rated safe may let the interior reach temperatures that damage it. Paper classes allow interior temperatures well above 100°C, while data classes keep the interior far cooler. Treat a USB in a document safe as a convenience copy and keep another backup elsewhere, or move it to a data safe or data insert.
Does a data safe also protect against theft?
Not always. Some data safes are designed mainly for fire and carry a modest cash rating or none at all. Others, such as the Chubb DataPlus+ range, are built for both. Check the cash rating and the steel construction as well as the fire class, and bolt the safe down to make it harder to remove.
Get Advice on the Right Data Safe
Data safes vary a lot in class, capacity and burglary protection, and we are happy to explain the options. Visit our Tullamarine showroom at 38 Barrie Rd to see units side by side, call 0409 860 011 (Monday to Friday, 9am to 5pm), or contact our team about data and media protection.
