SD（固态数字(Solid State Digital)）卡是一项了不起的技术。特别是当涉及到指甲大小的微型(Micro)版本时。这些小卡片可以容纳数十、数百甚至数千 GB 的数据！
不幸的是，小尺寸的 SD 卡是有代价的。SD 卡不仅易碎且容易丢失，而且还具有停止工作或提供损坏数据版本的可怕趋势。
如果您遇到这种情况，让我们看看如何从损坏的 SD 卡中恢复数据。
此外，请务必查看我们的 YouTube 频道，我们在该频道中发布了有关如何解决损坏的 SD 卡的简短视频：
我的 SD 卡真的损坏了吗？
在我们查看恢复损坏的 SD 卡之前，让我们快速讨论一下表明您的 SD 卡首先遭受损坏的症状。以下是您的 SD 卡已损坏的一些常见迹象：
- 您可以看到卡上的文件，但无法读取和/或写入它们
- SD 卡显示为空，即使您知道那里有文件
- 您可以看到照片等文件，但是当您打开它们时，它们已损坏
- 从卡复制显示不可能的完成时间，通常以复制失败结束
- Windows 10 磁盘管理工具(Disk Management Tool)显示驱动器，但说它是空的或无法读取
如果这是您看到的行为，则可能是您的数据已损坏或 SD 卡本身有问题。在继续之前，您可能需要查看我们的故障排除指南，了解何时根本无法读取 SD 卡(SD cards can’t be read)。
基本诊断
在尝试数据恢复或执行格式化 SD 卡等重大操作之前，您应该采取一些基本的诊断步骤，以确保您知道哪个设备实际上是问题所在。
- 在另一台设备上试用 SD 卡
- 在同一设备中尝试使用已知工作的 SD 卡
- 尝试使用其他读卡器读取 SD 卡
- 尝试使用数据线通过原始设备读取 SD 卡
如果常见的罪犯确实是 SD 卡，请继续阅读以获得进一步的建议。
SD 卡问题与写入损坏
完全有可能您的 SD 卡很好，但是从卡中读取和写入数据的设备以某种方式搞砸了。也许它在写作时失去了力量，或者它还有其他问题。在这些情况下，在您恢复了可以恢复的数据后，您可以简单地重新格式化卡以使其可用。
假 SD 卡
如果这是一张新的 SD 卡或您以前从未真正填满的 SD 卡。有可能您实际上购买了假 SD 卡。“假(Fake)”是指您出售的容量并不是卡上实际显示的容量。
假 SD(Fake SD)卡是现代技术的祸害。由于小容量 SD 卡非常便宜，但大容量 SD 卡的价格要高很多倍，因此诈骗者会创建报告错误容量的卡。因此，例如，您的“128GB”SD 卡可能只有 16 GB 的实际容量。发生的情况是，当该 16GB SD 卡填满时，该卡将开始覆盖循环中的第一个数据。
这实际上可以欺骗我们很长时间，因为我们可能只检查我们保存的最新文件，或者可能在很长一段时间内无法达到实际 SD 大小的最大容量。
如果您怀疑您的 SD 卡是假的而不是损坏的，请尝试使用众多可供下载的假 SD 卡测试仪之一。FakeFlashTest是一种流行的解决方案，它会告诉您您的 SD 卡是刚刚损坏还是真的是伪造的。
使用磁盘检查器工具
有时不是您的实际 SD 卡或数据出了问题，而是卡的文件系统出现问题。只需(Simply)使用操作系统中的磁盘检查器工具即可从损坏的 SD 卡中恢复数据。在Windows 10中。这是做什么：
- 打开 Windows 资源管理器
- 右键单击(Right-click)有问题的驱动器
- 点击属性(Click on Properties)
- 选择工具
- 点击“检查”(Click on “Check”)
- 按照说明操作
如果您的实际数据没有损坏并且 SD 卡物理上没有问题，磁盘检查器将重建其逻辑结构并且磁盘应该可以再次使用。如果卡无法正常工作，磁盘检查器会通知您。
使用专门的恢复软件
如果您的DIY诊断都没有产生任何结果，并且 SD 卡至少在您插入时仍然显示出来，那么请考虑使用专门的 SD 卡数据恢复软件。
这些软件包绕过了普通驱动器管理标准的限制，并使用蛮力方法逐位检查 SD 卡。有时您可以通过这种方式完全恢复损坏的数据，或者至少部分恢复您的数据。这(Which)总比失去一切要好。
但是，这些程序无法创造奇迹。如果数据已被物理破坏或根本无法访问，那么软件确实无能为力。
Recuva是一个不错的起点，它是一款出色的通用数据恢复工具，过去曾多次保存我们自己的数据。
聘请数据恢复专家
假设您的 SD 卡上的信息非常重要。也许您刚刚为一个重要项目拍摄了一次千载难逢的事件，当您回到家时发现 SD 卡无法工作或数据无法读取。
当数据很有价值时，您需要考虑获得数据恢复专家的帮助，以从损坏的 SD 卡中恢复数据。这些公司可以使用远远超出普通消费者的设备和软件。他们可以重建损坏的硬件组件并直接从媒体读取数据。
这不仅包括常见的损坏错误，还包括电子故障、内存芯片故障、火灾损坏、水损坏、物理损坏以及您能想象到的任何事情。
听起来(Sounds)不错，对吧？嗯，当然是，但是聘请这些专家的服务是昂贵的，所以有问题的数据对你来说必须是值得的。
预防胜于治疗
看(Look)，您可能正在阅读这篇文章，因为您在 SD 卡损坏时遭受了损失。希望(Hopefully one)上述解决方案之一已恢复您的部分甚至全部数据。但是，有时数据会永远丢失。
因此，为了防止自己再次成为 SD 数据丢失的受害者，请考虑执行以下操作：
- 使用自动云存储(cloud storage)备份 SD 卡数据，例如照片或视频
- 手动使用Google One、DropBox或OneDrive等服务(OneDrive)
- 尽快将 SD(Move SD)卡内容从无人机和相机等设备转移到您的计算机
- 在两个不同的地方至少保留两份不可替代的数据
- 仅在数据完整性至关重要的情况下才从知名品牌购买高质量 SD 卡
SD 卡相当强大，但它们似乎仍然比其他类型的固态存储更频繁地出现故障。特别是如果您在不断写入它们的应用程序中使用它们。以承认其弱点的方式使用您的 SD 卡将帮助您从一开始就防止损失。
How To Recover Data From a Corrupted SD Card
SD (Solid State Digital) сards are amazing bits of technology. Espeсially when it comes to the tinу, fingernail-sized Micrо versions. These little cards can hold tens, hundreds, and even thousands of gigabyteѕ of data!
Unfortunately, the small size of SD cards comes with a price. Not only can SD cards be fragile and easy to lose, but they also have a horrible tendency to stop working or offer up corrupted versions of your data.
If that’s happened to you, let’s look at how to recover data from a corrupted SD card.
Also, be sure to check out our YouTube channel where we posted a short video on how to troubleshoot corrupted SD cards:
Is My SD Card Actually Corrupt?
Before we look at recovering a corrupted SD card, let’s quickly talk about the symptoms that indicate that your SD card is suffering from corruption in the first place. Here are some common signs that your SD card has been corrupted:
- You can see the files on the card, but can’t read and/or write to them
- The SD card shows up as empty, even though you know there are files there
- You can see files such as photos, but when you open them they are corrupted
- Copying from the card shows an impossible completion time, usually ending in copy failure
- The Windows 10 Disk Management Tool shows the drive, but says it’s empty or unreadable
If that’s the behavior you’re seeing, chances are that your data has become corrupt or the SD card itself is in trouble. Before you proceed, you may want to check our troubleshooting guide for when SD cards can’t be read at all.
Basic Diagnostics
Before attempting data recovery or doing something drastic like formatting the SD card, there are a few basic diagnostic steps you should take to make sure you know which device is actually the problem.
- Try the SD card in another device
- Try a known working SD card in the same device
- Try reading the SD card with a different reader
- Try reading the SD card via the original device using a cable
If the common offender is indeed the SD card, then read on for further advice.
SD Card Issues Vs Corrupted Writes
It’s entirely possible that your SD card is just fine, but that the device that reads and writes data from the card messed up somehow. Maybe it lost power while writing or there’s some other problem with it. In these cases, after you’ve recovered what data you can, you can simply reformat the card to make it usable.
Fake SD Cards
If this is a new SD card or one that you’ve never really filled up before. There’s a possibility that you’ve actually bought a fake SD card. “Fake” in the sense that the capacity you were sold isn’t what’s actually on the card.
Fake SD cards are a scourge of modern technology. Since small-capacity SD cards are so cheap but larger ones are many times more expensive, scammers create cards that report false capacities. So, for example, your “128GB” SD card might only have 16 GB of actual capacity. What happens is that when that 16GB SD card fills up, the card just starts overwriting the first data in a loop.
This can actually fool us for a long time since we’re likely to check only the most recent files we’ve saved or might not reach the maximum capacity of the real SD size for quite some time.
If you suspect that your SD card is fake rather than corrupted, try using one of the many fake SD card testers available for download. FakeFlashTest is one popular solution that will tell you if your SD card is just broken or actually counterfeit.
Use a Disk Checker Tool
Sometimes it’s not your actual SD card or data that’s gone wrong, but something about the card’s file system. Simply using the disk checker tool in your operating system can recover data from a corrupted SD card. In Windows 10. Here’s what to do:
- Open Windows Explorer
- Right-click on the drive in question
- Click on Properties
- Select Tool
- Click on “Check”
- Follow the instructions
If your actual data is not damaged and the SD card is physically fine, the disk checker will rebuild its logical structure and the disk should be usable again. If the card isn’t working properly, the disk checker will let you know.
Using Specialized Recovery Software
If none of your DIY diagnostics yield any results and the SD card still at least shows up when you insert it, then consider using specialized SD card data recovery software.
These software packages go around the limitations of the average drive management standards and examine the SD card bit-by-bit using brute force methods. Sometimes you can recover corrupted data fully this way or at least recover your data partially. Which is better than losing all of it.
However, these programs can’t perform miracles. If the data has been physically destroyed or cannot be accessed at all, then there really is nothing the software can do.
A good place to start is Recuva, a great general-purpose data recovery tool that has saved our own data many times in the past.
Hire A Data Recovery Specialist
Let’s say that the information on your SD card is absolutely critical. Perhaps you just filmed a once-in-a-lifetime event for an important project and when you got home it turns out the SD card doesn’t want to work or the data is unreadable.
When data is valuable, you’ll want to consider getting the help of a data recovery specialist to recover data from a corrupted SD card. These companies have access to equipment and software far beyond the average consumer. They can rebuild broken hardware components and directly read data from the media.
This includes not only common corruption errors but electronics failure, memory chip failure, fire damage, water damage, physical damage, and just about anything you can imagine.
Sounds great, right? Well, it certainly is, but engaging the services of these specialists is expensive, so the data in question has to be worth it to you.
Prevention Is Better Than The Cure
Look, you’re probably reading this article because you’ve suffered a loss when it comes to your corrupted SD cards. Hopefully one of the solutions above has recovered some or even all of your data. However, sometimes data is simply lost forever.
So to stop yourself from becoming a victim of SD data loss again, consider doing the following:
- Use automated cloud storage to back up SD card data such as photos or videos
- Manually use services like Google One, DropBox or OneDrive
- Move SD card contents from devices like drones and cameras to your computer ASAP
- Keep at least two copies of irreplaceable data in two separate places
- Only buy high-quality SD cards from reputable brands if data integrity is critical
SD cards are fairly robust, but they still seem to fail more often than other types of solid-state storage. Especially if you use them in applications where they are written to constantly. Using your SD cards in a way that acknowledges their weaknesses will help you prevent losses in the first place.
