The popular Redmi Note 4 smartphone often faces a situation where the device’s internal memory is filling up rapidly. One of the main reasons for the lack of space is audio recordings of telephone conversations, which are stored in high quality by default. Deleting these files is not just a way to free up gigabytes, but also a necessary measure to ensure the confidentiality of personal information. In this article, we will discuss all available cleaning methods.
The standard MIUI shell installed on the Xiaomi Redmi Note 4 offers multiple levels of access to audio files. You can delete records directly from the call interface, use a system voice recorder, or consult a file manager for deep cleaning. Each method has its own characteristics and is suitable for different use cases. Understanding the storage structure will help you manage memory more efficiently.
Before proceeding with permanent deletion, it is important to make sure that there is no critical data among the files being saved. Often users forget about recorded bank numbers or important arrangements that may be necessary in the future. Backing up valuable audio files to a computer or cloud storage will be a reasonable first step before a mass cleanup of the system.
Deleting calls through the standard call app
The easiest and most obvious way to get rid of unnecessary audio recordings is to use the built-in functionality of the Phone app, which is ideal when you need to delete one or more specific records associated with certain contacts. MIUI allows you to quickly find the desired dialogue and manage the attached files without going to other menus.
To start, open the Phone app and go to the call history tab. Find the contact or number that you recorded the conversation with. Usually, a small voice recorder icon shows up next to or below the number indicating the audio file. Click on this contact to reveal the details of the call.
In the call details menu that opens, you will see a list of all calls made and, if any, playback or deletion buttons. Press and hold your finger on the record icon or select Delete Record from the context menu. The system will request confirmation of action, after which the file will be erased from the device memory.
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Use the Favorites feature in your call history to flag important conversations before a mass clean-up so you don’t accidentally delete the information you need.
If you need to delete records en masse, this method can take a long time, because it requires a personalized approach to each contact, but for point cleaning, it remains the most convenient tool. Otherwise, it is better to use more powerful file management tools, which we will discuss later.
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Deleting through call history is safe for the system, but it is inconvenient to clean hundreds of files at once.
Cleaning through a system dictaphone
The MIUI Dictophone app serves as the central repository for all audio recordings, including phone calls, and here files are presented as a list with the ability to sort by date, duration or name, making the process of finding and deleting large amounts of data much more efficient.
Run the Recorder app on your Redmi Note 4. At the top of the screen you'll see a category switch or tabs. Select Call Records to filter only phone conversations, eliminating voice notes and interviews. This will prevent important recorders from being accidentally deleted.
To delete the files in the list, click and hold your finger on one of the files in the list, and this activates the selection mode, and checkboxes next to each item will appear on the screen, you can manually mark the desired files or use the "Select All" function in the control menu. After selecting, click the delete button (usually the basket icon).
⚠️ Note: Select All can cover files from other folders unless Call Records filter is activated. Always check which files are highlighted before confirming deletion.
Once confirmed, files are moved to the recycle bin or deleted permanently, depending on the version of MIUI. Some firmware versions have a "Recent" feature that allows you to recover erroneously deleted records within 30 days, which serves as an additional insurance against loss of important data.
Managing Files through a Conductor
For users accustomed to full control of the file system, the standard File Manager will be an indispensable tool, which allows you to see the real structure of folders and delete files that can be hidden in standard application interfaces.
Open the Explorer app and go to the internal memory section. You need to find a folder called MIUI, And inside it is a folder. sound_recorder. And that's where all the audio recordings of the system are stored by default. call_rec, which contains only telephone records.
The complete path to the directory is as follows:
/storage/emulated/0/MIUI/sound_recorder/call_rec/When you go to this folder, you'll see a list of files with the.m4a or.mp3 extension. File names usually contain the date and time of the write, which makes it easier to navigate. You can sort files by size to find and delete the heaviest records that take up the most space.
☑️ Check before removal in the conductor
Using a conductor also allows you to copy files to your computer before deleting.Just connect your smartphone to your PC via a computer. USB-cable, select file transfer mode (MTP) and copy the contents of the folder call_rec Once you've created the backup, you can safely clean the phone's memory.
Comparison of methods of deleting records
The right method depends on your goals: whether you need to delete one file, clear the place to install a new application or prepare your phone for sale.
| Method | Speed of operation | Convenience of mass disposal | Risk of error |
|---|---|---|---|
| Phone appendix | Low. | Low (one at a time) | Minimum |
| Dictator appendix | Medium | High (groups) | Medium. |
| Conductor (Files) | Tall. | Maximum (all at once) | High (can be removed extra) |
| Computer (USB) | Depends on the PC. | High. | Medium. |
As you can see from the table, Explorer or a computer connection is the best way to quickly clean up large amounts of data, and if you want to carefully disassemble the archive of calls without risking removing something important, the Dictator app will be the middle ground.
It is worth noting that when you delete files through the Explorer, files disappear instantly, bypassing the basket of some applications, so attentiveness when working with the file system directly through directories is a critical skill for the owner of Xiaomi.
Automatic setup of record storage
To keep the memory problem from returning, it’s wise to set up automatic record management. Modern versions of MIUI for Redmi Note 4 have flexible settings to limit the number of files saved or their shelf life.
Go to the settings of the Dictophone or Phone app (via the three-dot menu). Find the section responsible for Call Recording. Here you can activate the option to automatically delete old records. For example, you can set the system to store only the last 50 records or files in the last week.
Hidden recording settings
It is also recommended to periodically check the Recycle Bin folder in the file manager. Deleted files often stay there for 30 days, continuing to take up space. Cleaning the Recycle Bin is the final step that really frees up disk space.
⚠️ Note: Automatic deletion works only for new records. Old files already stored in memory must be manually deleted by one of the methods described above.
Customizing these settings will take just a few minutes, but save you hours of manual sorting in the future. Automating your smartphone’s maintenance processes is key to its long and stable operation without the need for constant user intervention.
Recovery of deleted records
If you delete an important record by mistake, don't panic. There are ways to try to recover the data, although success is not 100% guaranteed. The less you do with your phone after deleting, the better the chances of success, as new data can overwrite memory sectors.
First, check cloud services. If your Redmi Note 4 has been enabled to sync with Mi Cloud or Google Drive, a copy of the file may have been saved there. Go to the web version of the cloud from your computer and check the Audio or Dictator sections.
The second option is to use specialized data recovery software such as DiskDigger or Recuva (which requires a PC connection), which scans internal memory for “simmering” file links, but deep scanning often requires Root rights, which can invalidate warranty and disrupt banking applications.
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The chance of recovering files without Root rights is extremely low, so regular backups remain the only reliable method of data protection.