Open Disk Drill and select the problematic USB, SD card, or drive. Download the free Mac version of Disk Drill from the Cleverfiles website and install it. In this case, you’ll have to send your drive to a professional data recovery center. Any further recovery attempt can worsen the problem and delete your data forever. This is important because if you find that even recovery software can’t save your data, your drive might be physically damaged. Even if your operating system can’t read your volume – Disk Drill can.ĭisk Drill is a paid tool – however, you can preview unlimited files for free (even videos). A super simple way to do this is by using a data recovery tool like Disk Drill. If you have important files on your drive or partition, recover your data first. How to Recover Deleted Data from a Problematic Deviceīecause of the nature of volume and partition corruption, the solution to this problem usually includes erasing data. So when it gets corrupted by a virus attack or a power surge, for example, it becomes unreadable. It contains crucial information about the volume. A disk can have multiple partitions that show up as individual storage units when connected to a computer – even if, physically, it’s just a single disk.Ī “partition map” defines how partitions are organized on a disk. Method #3: Use the Terminal App to Format the Drive Create a New Partition MapĪ “partition” is a segment (called a “region”) in a disk that is treated as an individual storage unit. Method #2: Use Disk Utility to Format the Drive and Create a New Partition Map. Method #1: Use Disk Utility’s First Aid Feature. 
How to Fix “Couldn’t modify partition map” Error.How to Recover Deleted Data from a Problematic Device.
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