HumVision Cannot Find My Recording

Use this when

You open HumVision and select a folder, but the app shows an error like "No sonar channel files (.SON) found in the selected directory", or the recording simply fails to load.

Common reasons

• Wrong folder selected — Humminbird writes each recording into its own numbered subfolder (your recording folder usually starts with R followed by a number, such as R00008). Selecting the parent folder instead of the individual recording folder will find no files.
• Missing .SON files — At least one .SON file must be present. If the SD card was removed during recording, some channel files may be absent or truncated.
• Corrupted or zero-byte files — A failed card write can leave a .SON file that appears present but is unreadable.
• Files renamed or moved — HumVision looks for files with the exact names the unit wrote (B000.SON, B001.SON, etc.). Renaming or reorganising the folder breaks discovery.
• File system not yet mounted — On macOS, an SD card or external drive may take a few seconds to mount fully after plugging in.

How to check

1. Open Finder and navigate to the folder you selected. Confirm it contains files named B000.SON (and optionally B000.IDX, Recording.DAT, etc.) directly inside, not one level up.
2. Check file sizes. A valid .SON file is typically several megabytes. A file showing 0 bytes means the write was incomplete.
3. If the files are inside a subfolder, note the subfolder name and select that folder instead when opening in HumVision.

What to try next

1. Click Open Recording and select the specific numbered subfolder (the folder with a name like R00008), not the parent folder.
2. Copy the recording folder from the SD card to your local drive before opening. Some card readers present the file system as read-only or throttle reads in a way that triggers timeouts.
3. If the card was removed mid-recording, try a different recording from the same card to confirm whether the card or that specific recording is the problem.
4. Re-format the SD card in the Humminbird unit (not in a computer) and record a new test file to rule out a card error.

If it still does not work

If you can see the .SON files in Finder but HumVision still refuses to open them, contact support at support@gethumvision.com and include the recording folder name, file sizes, and any error text shown in the app.