How to Use Wii Backup Manager: The Complete Step-by-Step Guide
Wii Backup Manager 0.4.5 Build 78, written by fig2k4, is a free, closed-source, Windows-only utility that converts and transfers Wii game backups between ISO, CISO and WBFS formats and manages them on FAT32, NTFS and WBFS drives.
This is the hub guide for the whole workflow. It walks you from a verified download to games that appear in your USB loader, in the exact order you should do things the first time. If you only need one part of the process, jump to the focused tutorials linked in each step: installing the portable app, converting ISO to WBFS, formatting a drive, downloading covers, or moving a library between drives. Everything below assumes you are working with backups of games you own, on a Windows PC.
Step 1: Download Wii Backup Manager and Verify the File
Download the portable zip from the download page. The main channel links to the official site at wiibackupmanager.co.uk; a clearly labelled Mirror (Terabox) copy of the same zip is also listed. The file you want is the Build 78 portable package, which is 7,815,799 bytes. Because the program is portable, there is nothing to install yet — but do verify the file before you run it, especially if you used the mirror.
To verify, open PowerShell in the folder where you saved the zip, run Get-FileHash .\WiiBackupManager.zip -Algorithm SHA256 and compare the result with the published SHA-256 be913ae19093797d3fe5c15fda18b2bb6af99df5a48d1a579941e6f3b3cc8edd. The MD5 should be 8d6b3e9996f6e7782eac931376c7356c. If either hash differs, delete the file and download again from the official channel — a mismatch means the copy is incomplete or has been altered. A matching hash is the strongest simple check that you have the genuine final release.
Step 2: Extract the Portable App and Launch It
Right-click the verified zip and choose Extract All, or use your usual archiver, and put the resulting folder somewhere permanent such as C:\WiiBackupManager. Do not run the program from inside the zip: it needs to write its settings and database next to the executable. Inside the folder you will find 32-bit and 64-bit builds; on any modern Windows PC, launch the 64-bit executable.
The first launch can take a few seconds while the program creates its configuration. If Windows SmartScreen appears, confirm the file hash matched first, then choose More info and Run anyway — this prompt is common for older unsigned freeware. For the full walkthrough of folder placement, permissions and first-launch fixes, see how to install Wii Backup Manager.
Step 3: Understand the Files Tab and the Drive Tabs
The interface is built around two kinds of tabs. The Files tab is a staging list: it holds the game images on your PC that you have queued up, without changing them. Each Drive tab (Drive 1, Drive 2, and so on) represents an actual Wii drive — a USB hard drive, a USB stick, or a folder you designate — and shows the games already stored on it in WBFS layout.
Almost everything in Wii Backup Manager follows the same pattern: select items on the left or in a tab, choose a Transfer destination, and let the program convert and copy. The log pane at the bottom reports every operation, including errors, so keep an eye on it during long transfers. Multithreaded processing means conversions can use several CPU cores at once, which noticeably speeds up large batches.
Step 4: Add Your Game Backups to the Files Tab
Click Add on the Files tab and choose Files or Folder. Wii Backup Manager reads ISO, CISO, WBFS and even RAR archives directly, so you do not need to extract compressed backups first. Added games appear with their Game ID, title, region and size. Titles and cover art come from the GameTDB database; if names look wrong or covers are missing, fix that after your first transfer using the GameTDB covers guide.
- Click the Files tab, then Add → Files (or Folder for a whole directory).
- Select your .iso, .ciso, .wbfs or .rar backups and confirm.
- Check that each game shows the correct Game ID — the ID, not the filename, is what loaders match covers and settings against.
- Tick the checkbox next to each game you want to transfer.
Step 5: Prepare the Target Drive
Connect your USB drive and assign it to a Drive tab using the drive selector at the top of the tab. Wii Backup Manager works with three layouts: a dedicated WBFS partition, and ordinary FAT32 or NTFS drives where games live in a /wbfs/ folder. For most people FAT32 is the practical choice because every loader reads it, and the program automatically splits any game larger than 4 GB into a .wbfs plus .wbf1 pair. The full reasoning and formatting steps are in how to format a drive FAT32 for Wii.
Warning: formatting erases the drive. Back up anything you need first, and double-check the drive letter in the selector before confirming — the program will act on the drive you selected, not the one you meant to select.
Step 6: Transfer Games to the Drive
With games ticked on the Files tab and the target drive open in a Drive tab, click Transfer and choose the drive. Wii Backup Manager converts each game to WBFS as it copies, creating the standard structure /wbfs/GameName [GameID]/gameid.wbfs automatically. That structure matters: USB Loader GX and other loaders scan exactly this layout, so never rename the folders or files by hand afterwards.
A single game usually takes a few minutes depending on drive speed. If you are converting a whole collection, use the batch workflow in how to batch convert Wii games instead of transferring one title at a time. When the log shows no errors, safely eject the drive from Windows before unplugging it — interrupting a write is the most common cause of a corrupted WBFS file.
Step 7: Play the Games in Your Loader and Keep the Library Tidy
Plug the drive into the Wii (use the correct USB port for your loader setup — on a standard Wii that is the port nearest the edge of the console) and start USB Loader GX. Your transferred games should appear in the library with GameTDB covers. If the drive is not recognised at all, work through USB Loader GX not recognising the drive before reformatting anything.
From here, day-to-day tasks are small variations on the same flow: reverse a conversion with WBFS to ISO, migrate to a bigger drive with drive-to-drive transfer, or read about the limits of GameCube games in Wii Backup Manager. Mac and Linux users cannot run this Windows-only program at all — see the Mac and Linux pages for the cross-platform TinyWiiBackupManager instead. More answers are collected in the FAQ.
🇧🇷 This guide is also available in Portuguese: Como Usar o Wii Backup Manager.