ERROR_WRITE_PROTECT - 19 (0x13)
The media is write protected.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_WRITE_PROTECT error code, represented by the numeric value 19 or hexadecimal 0x13, indicates that an attempt to write data to a storage medium has failed because the media is in a write-protected state. This condition can occur on various types of storage devices such as USB drives, SD cards, and external hard drives.
Error Details
This error typically arises when an application or system operation attempts to modify data on a storage device that has been configured to prevent writing operations. Write protection can be implemented by hardware mechanisms (such as physical switches) or software settings (like file system attributes).
Usage Context
The ERROR_WRITE_PROTECT error is commonly encountered in scenarios where an application needs to write files, create directories, or modify existing data on a storage medium. It may also appear during backup operations, synchronization tasks, or when attempting to update firmware.
Developer Interpretation
When encountering the ERROR_WRITE_PROTECT error, developers should consider the following aspects:
- Storage Medium State: Verify that the device is not in a write-protected state. Physical switches on USB drives and SD cards can be toggled to enable or disable write protection.
- File System Attributes: Check if any file system attributes are set to prevent writing operations. For example, certain file systems may have specific flags that indicate read-only status.
- Application Context: Ensure that the application has appropriate permissions and is operating in a context where it can perform write operations. Incorrect usage of APIs or incorrect operation contexts might lead to this error.
Related Errors
ERROR_ACCESS_DENIED(5) - Indicates insufficient permissions for an operation.ERROR_MEDIA_WRITE_PROTECTED(299) - A more specific error indicating the same condition but with a different numeric code.ERROR_INVALID_PARAMETER(87) - May be encountered if parameters passed to write operations are invalid or incorrect.
FAQ
Q: What does the ERROR_WRITE_PROTECT error mean?
A: The error indicates that an attempt to write data has failed because the storage medium is in a write-protected state. This can occur due to hardware switches, file system attributes, or software settings preventing writes.
Q: How can I resolve this issue?
A: Ensure that the storage device is not physically write-protected and check if any file system attributes are set to prevent writing operations. Verify application context and ensure correct usage of APIs.
Summary
The ERROR_WRITE_PROTECT error code signifies a failure in write operations due to the media being in a write-protected state. Developers should focus on verifying device states, checking file system attributes, and ensuring appropriate operation contexts when encountering this error.