S3FS Integration with Backblaze B2
  • 14 Jul 2026
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S3FS Integration with Backblaze B2

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Article summary

S3FS is a Filesystem in Userspace (FUSE) that allows you to mount a bucket in S3-compatible storage as a local filesystem. You can use S3FS with Backblaze B2 Cloud Storage using the following steps.

  1. Add your Key ID and Application Key into the file /etc/passwd-s3fs, separated by a colon:
    sudo vi /etc/passwd-s3fs
    Use this format for your Key ID and Application Key:
    0xxxxxxxxxxxxxx7:KxxxxxxxxxxxxxxxxxQ
  2. Ensure that the passwd-s3fs file has the correct permissions:
    sudo chmod 640 /etc/passwd-s3fs
  3. Create a directory that will be your local mount point. In this example, the directory is created within the home directory (~):
    sudo mkdir -p ~/s3fs-bucket1
  4. Mount your Backblaze bucket in the local directory that you created, using the following command format.
    sudo s3fs mybucket /path/to/mountpoint -o passwd_file=/etc/passwd-s3fs -o url=https://s3.your-region.backblazeb2.com

Help us improve this guide. If you find an error, notice outdated information, or have suggestions for improvement, email techpubs@backblaze.com.


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