Knowledge Base
Guides, FAQs, and troubleshooting for Callback Technologies products.
CBFS Storage
166 articles
Choosing a File Format for Bundling Encrypted Application Data
Mounting Multiple Cloud Storage Providers as Local Drives in .NET Applications
A Commercial Alternative to Sysmon You Can Build Into Your Application
Commercial Alternatives to FUSE on Windows
Dokan vs. WinFsp: Comparing Windows User-Mode Filesystem Frameworks
Building OneDrive-Style File Sync Into Your Own Application
PCAP Filter vs. libpcap, WinPcap, and Npcap
Capturing Network Packets on Windows Without Writing Your Own Driver
Building GDPR-Aligned Applications with Callback Technologies
Building HIPAA-Aligned Applications with Callback Technologies
See more (156)... Show less
Supporting an ISO/IEC 27001 ISMS with Callback Technologies
What's New in Version 2026
CBFS Connect 2026 API Changes
CBFS Filter 2026 API Changes
Silent Install Options
Connecting CBCloudDrive to Azure Blob Storage
Connecting CBCloudDrive to Azure Files
Connecting CBCloudDrive to Cloudflare R2
Connecting CBCloudDrive to Google Drive
Connecting CBCloudDrive to an NFS Server
Connecting CBCloudDrive to Microsoft OneDrive
Connecting CBCloudDrive to Oracle Cloud Object Storage
Connecting CBCloudDrive to an SFTP Server
How can I block an incoming or outgoing connection?
How can I make a drive visible in Windows Subsystem for Linux (WSL)?
Getting Started with IPMonitor
Getting Started with NetFilter
Replacing Npcap with PCAP Filter in Wireshark
Getting Started with the CBEncrypt Component
Why is OnCloseFile event fired long after the file is actually closed?
Running as a Service on Linux using Callback Drive for SFTP
Callback Drive for SFTP - Log Settings
Callback Drive for SFTP - Proxy Settings
Windows Shell shows a drive with a network mounting point as 'Disconnected'.
Windows Guide: Callback Drive for Microsoft Azure
How do I notify the system that a file in a CBFS Connect drive's backend storage has been deleted or modified?
Can I create files and directories that don't really exist on disk using CBFS Filter?
Connect to OnTap S3 using Callback Drive for Amazon S3
Why does File Explorer read files when I just browse a directory?
Streaming or Synchronization: Best Approach for Your Project
Getting Started with ShellOverlays
What Windows versions are supported by the components?
What happens if a certificate used to sign the driver and the DLL expires?
Implementing Virtual Files with CBFS Filter
Creating a Replacement for FileSystemWatcher
Overview of Process Monitoring with CBFS Filter
Tracking Process Creation with CBFS Filter
Overview of Registry Monitoring with CBFS Filter
Access and Default Rules in CBFS Filter
Connect to Amazon S3 using Callback Drive for Amazon S3
Connect to Backblaze B2 using Callback Drive for Amazon S3
Connect to Cloudflare R2 using Callback Drive for Amazon S3
Connect to DigitalOcean Spaces using Callback Drive for Amazon S3
Connect to IBM using Callback Drive for Amazon S3
Connect to iDrive e2 using Callback Drive for Amazon S3
Connect to Linode using Callback Drive for Amazon S3
Connect to MinIO using Callback Drive for Amazon S3
Connect to OORT DSS using Callback Drive for Amazon S3
Connect to Oracle using Callback Drive for Amazon S3
Connect to Seagate Lyve Cloud using Callback Drive for Amazon S3
Connect to Wasabi using Callback Drive for Amazon S3
CBFS Connect 2024 API Changes
CBFS Filter 2024 API Changes
CBFS Vault 2024 API Changes
Version 2024 Updates
Version 2024 Upgrade Guide
File Isolation in CBFS Filter
How to remove the driver - the procedure and caveats
Callback Drive for Amazon S3 Feature Comparison
Feature Comparison: Callback Drive for SFTP
Linux Guide: Callback Drive for Amazon S3
Linux Guide: Callback Drive for SFTP
CBFS Connect 2022 API Changes
CBFS Filter 2022 API Changes
CBFS Vault 2022 API Changes
Docker Support in CBFS Connect 2022
Connect to Scality with Callback Drive for Amazon S3
Add a Custom Provider to Callback Drive for Amazon S3
Migrating Settings with Callback Drive for SFTP
AES Drive FAQ
FAQ: Callback Drive for Amazon S3
Callback Drive for SFTP FAQ
AES Drive Feature Comparison
Why are On*CloseFile events fired long after the file is actually closed?
Compare CBFS and FUSE Components
How do I protect my process or thread from being suspended/paused or terminated?
Why driver deinstallation or update require system restart?
How do I protect directory contents from modifications?
Mount to a Folder with Callback Drive for SFTP
How do I prevent file deletion using filter rules?
AES Drive - Getting Started Guide
Windows Guide: Callback Drive for Amazon S3
What's New in CBFS Direct 2020
What's New in CBFS Connect 2020
What's New in CBFS Disk 2020
What's New in CBFS Filter 2020
What's New in CBFS Storage 2020
How do I guard against data loss caused by vault file corruption?
Callback Drive for SFTP - Authentication Guide
Windows Guide: Callback Drive for SFTP
Why Choose CBFS Connect over Dokan?
eDiscovery Compliance for Existing and Planned Information Systems
From Filesystems to the Cloud and Back
7 Reasons to Manage Application Data via Filesystem vs. DBMS
Digital Rights Management (DRM) with CBFS Vault
Using Callback Mode in CBFS Vault
Using PKI-Based Security with CBFS Vault
Custom filesystems as optimal solutions for huge media data archives and storage
If I grant a specific process access to the drive, will any child processes it creates be able to access the drive as well?
How can I use CBProcess to prevent a process from being started?
How do I limit the size of a Vault?
How can I prevent my vault from being accessed by Vault Explorer and other CBFS Vault demo applications?
What happens when an application attempts to access a password-protected file?
Is CBFS Vault FIPS Certified?
Why is adding files to the Vault so slow?
What tools are provided to check Vaults for errors?
Can I access a vault from several applications at once?
Why is not my mounting point visible in File Explorer?
FileSystemWatcher and ReadDirectoryChangesW vs. CBFS Filter
Product Comparison
How can I create a file in a directory protected with a read-only access rule?
Is it possible to create nested virtual directories?
Why can't I create a directory or file whose name ends with a dot (".")?
Windows 10 now supports long file names. Can we?
How can I attach the filter to a USB drive?
I get a BSOD with the error code NO_MORE_IRP_STACK_LOCATIONS (35). What's that?
In some cases I get a filename in ALL CAPS. What's wrong?
Can I use the GetOriginator* methods in the Notify* events?
How can I make a directory read-only, but have its subdirectories be read-write?
How can I monitor the files in a directory, but not its subdirectories?
How do I track file copying?
Is there any integrity check to validate which process is using CBFS Filter?
Why doesn't my application receive events for mapped network drives?
Is CBFilter a minifilter driver?
I need to monitor file operations on a server. Is this possible with CBFS Filter?
How do I know which user initiated a filesystem event?
Does the driver need to be reinstalled each time the computer reboots?
Why doesn't CBFS Connect provide asynchronous versions of events?
How do I collect a log of file operations on the drive for debugging purposes?
How do I create a drive for only one user (session)?
I created a local mounting point with the STGMP_LOCAL and STGMP_NETWORK flags. Why is this drive visible in File Explorer's "Network" area?
Should I delete backend data in the CanFileBeDeleted event handler?
How can I make my drive support paths longer than 260 characters?
What is the sequence of events fired when File Explorer opens a directory?
File Explorer stops showing SMB shares after a network mounting point with a share is created.
What is this strange file name with a colon inside?
What happens if the filesystem fails to delete the actual file from backend storage?
How do I get rid of the Windows warning box when installing drivers?
Can I clear the metadata cache?
Will the CBFS component fire multiple events for the same file at the same time?
How can I make a file read-only for a certain process?
How do I make a Recycle Bin on my virtual drive?
When I set "SectorSize" to 4096 and "StorageType" to "STGT_DISK_PNP", some applications can't access the disk. Why?
What effects does setting FileSystemName to NTFS have?
How do I show different files to different users on the same filesystem?
Why is copying files to/from a CBFS Connect drive so slow?
The Initialize method throws a strange exception saying that the driver is not found. Why?
Why does the system become slow if I perform lengthy operations in the OpenFile, CreateFile, or CloseFile events?
Is there a problem if timeout is disabled?
Why is a timeout necessary?
Why can't I share a directory on my virtual drive?
When SerializeEvents is false, do filesystem operations for the same file fire on one thread?
Why doesn't returning error in the DeleteFile event handler prevent file deletion?
Can you provide a WHQL-signed version of the driver?
CBFS Vault vs. ZIP
7 Tiers of Data Recovery: Software Aspects