A good hardware wallet backup is one you can restore correctly, keep secret, and protect for as long as you need it. For most BitBox02 users, the included microSD card is the simplest starting point because it avoids manual transcription. Written recovery words offer broader compatibility with BIP39-compatible wallets, while a steel backup gives those words greater protection from fire, water, and physical deterioration.

This guide compares the options that are relevant to BitBox users. Recovery words stored on paper, a dedicated backup card, or steel are used by many hardware wallets. The automatic microSD backup and its normal restoration process are specific to the BitBox02. Other hardware wallets may use different backup standards or recovery procedures.

For more examples and practical backup-protection strategies, the BitBox blog explains four proven methods for keeping your Bitcoin backup safe.

Understand what you are choosing

The first choice is how the wallet backup is represented. A BitBox02 can create its backup automatically on a microSD card, or you can record its BIP39 recovery words manually. The recovery words remain the foundation of the wallet in either case.

The second choice is the physical medium. Recovery words can be written on paper, recorded on a purpose-made Backup Card, or stored in steel. Paper and steel do not create different wallets; they provide different levels of physical protection for the same recovery information.

Compare the backup options

No option removes the need for secure storage. The right choice depends on which risk matters most in your situation: making a mistake during setup, losing access to a compatible recovery device, physical damage, or another person finding the backup.

microSD backup

The BitBox02 can create a backup automatically on the included microSD card during setup. This is the easiest option for most new BitBox02 users because the device writes the recovery information directly to the card and avoids mistakes caused by copying words by hand.

Normal restoration is fast on a new or reset BitBox02. The recovery information follows the BIP39 standard, but the microSD backup file is not imported directly into other hardware wallets during a normal recovery. If no BitBox02 is available, BitBox provides a documented emergency tool that can extract the recovery words on an offline computer. This is a last-resort procedure: exposing the words to a computer permanently compromises them, so the funds must then be moved to a newly created wallet.

The microSD backup is not encrypted or protected by a separate backup password. This avoids creating another recovery secret that could be forgotten, but it means physical access to the card must be treated as access to the wallet. For the reasoning behind this design, read why BitBox microSD backups are not encrypted by default.

Remove the card from the BitBox02 after use and store it privately, away from the device. If you want additional cards for backups kept in separate secure locations, BitBox offers microSD backup cards in a two-pack. To use this backup option from the beginning, follow how to set up a BitBox02 with a microSD card backup.

Recovery words on paper or a backup card

Writing down recovery words creates a human-readable backup that can be restored with compatible hardware or software wallets. Compatibility is broader than with the normal microSD restoration workflow, but it is not unlimited: the wallet must support the same recovery standard, networks, account types, and relevant derivation paths.

This option is inexpensive and does not depend on electronic storage, but every word and its position must be recorded accurately. Paper can also be damaged by water, fire, humidity, fading, or wear. A purpose-made Backup Card can improve organisation and resistance to ageing and moisture, but it is still less resistant to extreme physical conditions than steel.

If you want to create a BitBox02 wallet using recovery words from the start, follow how to set up a BitBox02 without a microSD card. Then use the separate guide to store recovery words securely.

Recovery words in steel

A steel backup stores the recovery words in a medium designed to withstand conditions that can destroy paper or electronic media. It is usually the strongest choice when protection from fire, water, corrosion, and long-term deterioration matters more than cost or setup effort.

Steel does not change how the wallet works or create a second type of recovery secret. It stores the same recovery words in a more durable form, so accuracy and privacy remain essential. Record the words carefully and follow the product’s verification instructions before relying on the backup.

BitBox offers the Steelwallet, Steelwallet Pro, and Seedor. These products use different formats and recording mechanisms, so compare their capacity, reusability, tamper evidence, and setup process before choosing. To understand the underlying concept first, learn what a Steelwallet is and how a metal Bitcoin backup works.

Which backup option fits your situation?

You want the simplest BitBox02 setup

Start with the included microSD card. It creates a valid backup quickly and removes the risk of copying a word incorrectly during the initial setup. You can display and record the recovery words on the BitBox02 later if your storage plan changes.

You prioritise recovery flexibility

Choose written recovery words if you want a human-readable backup that can be restored with compatible wallets without first using a BitBox02. Confirm compatibility before an emergency instead of assuming that every wallet will reproduce every supported account automatically.

You prioritise physical durability

Store the recovery words in steel. This adds cost and setup effort, but it provides stronger protection against environmental damage for a long-term backup.

You want protection from one backup being lost

Consider an additional complete backup in a separate secure location. Combining a convenient microSD backup with recovery words on paper or steel can protect against different failure modes. However, every additional copy is another secret that can be found or stolen, so redundancy should be deliberate rather than automatic.

Security rules for every backup

Keep the backup offline and never upload, photograph, scan, email, or save it in a cloud service or password manager.

Keep the backup separate from the hardware wallet so one incident does not expose or destroy both.

Verify that a microSD backup is readable or that written recovery words are complete and in the correct order.

Do not enter recovery words into a computer, smartphone, website, browser extension, or AI chatbot. Enter them only on a trusted compatible hardware wallet, except when following BitBox’s documented last-resort emergency procedure.

If you use an optional passphrase, keep a separate recovery plan for it. Neither the microSD backup nor the recovery words contain the optional passphrase.

Frequently asked questions

Is a steel backup different from recovery words?

No. A steel backup is a durable way to store recovery words. It does not create a different wallet or an additional recovery mechanism.

Can I change my BitBox02 backup method later?

Yes. After setup, you can create another microSD backup or display the recovery words on the BitBox02 and record them on paper or steel. Adding another copy does not change the wallet, but every complete copy must be protected.

Can I restore a BitBox02 microSD backup on another hardware wallet?

Not directly during the normal restoration process. Restore the card on a new or reset BitBox02 whenever possible. If no BitBox02 is available and you have no written recovery words, follow the emergency guide for extracting recovery words from a BitBox microSD backup. The extracted words must be treated as compromised, and the funds must be moved to a new wallet.

Should I keep more than one wallet backup?

An additional complete backup in a separate secure location can reduce the risk of permanent loss, but it also creates another opportunity for theft or accidental exposure. Choose the number of copies according to your storage locations, recovery plan, and threat model; there is no universal right number.

Does a wallet backup include an optional passphrase?

No. An optional passphrase is a separate secret. Recovery words or a microSD backup restore the underlying wallet, but you must enter the exact same optional passphrase to regain access to a passphrase-protected wallet. Learn how the BitBox02 optional passphrase works and what its recovery risks are.