How can I witre to a read only files without root or PC on a Android phone

Writing to a read-only file on an Android device without root access or a PC is quite challenging, as Android's file system is designed to protect system files and certain app data. However, there are a few potential workarounds you might explore, depending on your specific needs:

**Use an App with Write Permissions**: If you only need to modify a specific type of file (like text or images), see if there are apps available on the Google Play Store that allow you to edit or re-save these files. Many note-taking or document-editing apps can open files and save them in a readable format.

**Create a Copy**: If you can access the read-only file, try copying it to a location where you have write permissions (like your device's Downloads folder or a specific app's storage). You can then modify the copy.

**Use File Managers**: Some file manager apps available on the Play Store might let you browse through the storage and create copies of files or offer temporary access to modify files in a specific context. However, without root, your options may be limited.

**Cloud Storage**: Upload the read-only file to a cloud service (like Google Drive), make a copy there, and then edit the copy as needed. After editing, you can download or sync the modified file back to your Android device.

**Use an Online Editor**: If the file content is text-based and can be copied, consider using an online editor through your browser on the phone. You can paste the contents, edit them, and then save or download the new version.

Remember, these methods are limited and won't allow you to overwrite system files or app files that are restricted by permissions. If you need to modify files that are typically read-only due to system restrictions, your best option is often to explore root access, though this has its own risks and complications.