Recording

• Due to system restrictions, the remaining recording time may not increase if only the small size files are deleted.

• There is not enough free space in the built-in flash memory.

• Delete unnecessary files.

• Export recorded files to a computer. Necessary free space may vary, depending on the bit rate or recording time.

• The maximum number of files that can be recorded is reached. The maximum number of files that can be recorded is 999 files each for FM radio programs (NWZ-B172F/B173F only) and recorded voice files.

• Delete unnecessary files until recorded FM radio programs (NWZ-B172F/B173F only) and recorded sound files become 999 or less, respectively.

• Export the recorded files to a computer.

• Your Walkman is connected to a computer.

• Disconnect the Walkman from the computer.

• Due to system restrictions, remaining recording time may decrease by a few seconds when you start recording.

• A file or the folder that cannot be deleted is set to [Read-only] on a computer.

• Delete the data using Windows Explorer.

• The battery power is low or exhausted.

• Charge the battery fully [Details].

• Files other than recorded files are included in the folder.

• Open the folder using Windows Explorer, and delete all files other than those recorded with your Walkman.