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# Microsoft Confirms Disappearing SSD Bug in Windows 11 August 2025 Update
- URL: https://www.blog.nestict.com/microsoft-confirms-disappearing-ssd-bug-in-windows-11-august-2025-update/
- Published: 2025-08-24T11:25:28.000Z
- Updated: 2025-08-24T11:25:28.000Z
- Description: On August 12, 2025, Microsoft released its monthly Patch Tuesday update for Windows 11 version 24H2—specifically, KB5063878 (Build 26100.4946).
- Author: Nestict Infotech CSR
- Tags: Future Tech, Technology, Updates

## ⚠️ Background: A Troubling Update

On **August 12, 2025**, Microsoft released its monthly **Patch Tuesday update** for **Windows 11 version 24H2**—specifically, **KB5063878 (Build 26100.4946)**.

Shortly after, users began reporting alarming storage issues: **SSDs disappearing from Windows, input/output (I/O) errors, and data becoming inaccessible** after large file transfers. Microsoft has since **confirmed the reports** and is working with hardware vendors to investigate.

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## 🔎 Symptoms & What Happens

Affected users observed the following behavior:

- During **large write operations (≥ 50 GB)** on drives more than **60% full**, SSDs **vanish** from File Explorer, Device Manager, and sometimes even BIOS.
- Some drives reappear after a **reboot**, but others show partitions as **RAW**, making data recovery difficult or impossible.
- Early testing shows the issue is more frequent on **Phison-based and DRAM-less SSDs**, though it is not exclusive to them.

In extreme cases, users lost access to critical data.

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## 🗨️ Microsoft’s Response

- Microsoft acknowledged the reports and is **collecting feedback through the Feedback Hub**.
- **Phison**, a major SSD controller maker, is also investigating.
- Meanwhile, another patch (**KB5063875**) broke recovery tools like **“Reset this PC”**, prompting Microsoft to issue an **out-of-band (OOB) fix KB5066189**.

Clearly, this August update batch has been one of the more problematic ones in recent memory.

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## ✅ What You Should Do Right Now

### 1\. **Avoid Large File Transfers**

Break large jobs (like game installs or backups) into **smaller chunks** until a fix arrives.

### 2\. **Delay the KB5063878 Update**

If you haven’t updated yet, consider **pausing Windows Update** to avoid SSD risks.

### 3\. **Backup Your Data Immediately**

Follow the **3-2-1 rule**:

- 3 copies of your files
- 2 different storage types (SSD + external HDD/cloud)
- 1 copy offsite

### 4\. **Apply KB5066189 if Needed**

If your recovery/reset options are broken after KB5063875, install Microsoft’s emergency fix.

### 5\. **Report the Issue**

Submit reports via **Feedback Hub**—the more data Microsoft receives, the faster a permanent fix will come.

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## 📊 Quick Summary

| Issue                          | Cause (August 2025)                | What To Do                             |
| ------------------------------ | ---------------------------------- | -------------------------------------- |
| SSDs disappearing / I/O errors | KB5063878 + heavy writes           | Avoid large transfers, backup data     |
| Recovery tools broken          | KB5063875                          | Install OOB patch KB5066189            |
| Fix status                     | Microsoft + partners investigating | Wait for official patch, report issues |

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## 🔮 Wrapping Up

While not everyone is affected, the **risk of SSD corruption and data loss** makes this bug serious. Until Microsoft provides a confirmed fix, the best approach is **caution and backups**.

Stay safe—and don’t let your SSD vanish into thin air.