{"id":34217,"date":"2021-04-30T16:48:30","date_gmt":"2021-04-30T16:48:30","guid":{"rendered":"https:\/\/www.cleverfiles.com\/howto\/?p=34217"},"modified":"2025-03-05T11:58:27","modified_gmt":"2025-03-05T11:58:27","slug":"recover-disappeared-desktop-files-mac","status":"publish","type":"post","link":"https:\/\/www.cleverfiles.com\/howto\/recover-unallocated-partition.html","title":{"rendered":"How to Recover an Unallocated Partition"},"content":{"rendered":"

If you have multiple partitions on your hard drive, nothing will scare you more than booting up your computer and finding that one partition has disappeared. What used to be a partition full of files, is now unallocated space that can\u2019t be accessed.<\/p>\r\n

This can happen for a multitude of reasons, reasons that we\u2019ll take a closer look at in this article. The best action you can do right now is leave it as is until you\u2019ve explored all your available options. We\u2019ll show you several ways you can recover an unallocated partition and get your data back.<\/p>\r\n

\"How<\/p>\r\n

<\/span>What Is an Unallocated Partition?<\/span><\/h2>\r\n

Partitions are segments of a hard drive that have been logically separated to organize the data stored on it. A single drive can have multiple partitions. When you look at your drive and see unallocated space in Disk Management, this references space on the hard drive that hasn\u2019t yet been allocated to a partition.<\/p>\r\n

Unallocated disk space cannot store files or programs, and is basically useless to the operating system unless the space is used to create a new partition or is added to an existing partition to extend it.<\/p>\r\n

💡 If you\u2019re dealing with unallocated space that was once a partition that contained data, the worst thing you can do is create a new partition in its place. The data needs to be recovered first, as it\u2019s susceptible to being overwritten.<\/div>\r\n

<\/span>Reasons Behind Unallocated Partitions<\/span><\/h2>\r\n

A brand new hard drive will come without any partitions. When you install the drive into your system, you will need to create at least one partition before it can be used to store data. Any space that isn\u2019t dedicated to a partition will remain as unallocated space.<\/p>\r\n

However, a disk partition of unallocated space can appear as a result of something else. Here are a few common reasons why there may be unallocated space on your hard drive:<\/p>\r\n

<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Data loss reason<\/b><\/td>\r\nDescription<\/b><\/td>\r\n<\/tr>\r\n
Accidental deletion<\/td>\r\nMistakes happen. If you accidentally deleted your partition in Disk Management, as this user<\/a> did, the space that was once occupied will show as unallocated space instead. Your chances of recovery are high, so long as you leave the unallocated space untouched for now<\/td>\r\n<\/tr>\r\n
Unexpected power failure\u00a0<\/td>\r\nIf your computer loses power during a write process to the drive, it could cause some data to become corrupted and the partition deleted. This also includes the action of unsafely removing an external drive, as demonstrated in this thread<\/a> where a 1 TB hard drive became unallocated when unplugged.<\/td>\r\n<\/tr>\r\n
An unallocated partition appears after Windows reinstallation or update<\/td>\r\nWindows operating system (OS) installs and updates aren\u2019t always perfect. You may run into an issue where you can\u2019t select the drive you want to install Windows on until you delete another, as this user<\/a> faced. In this case, you shouldn\u2019t delete the drive that contains data, but if you have, leave it untouched for now.<\/td>\r\n<\/tr>\r\n
Mistakes made during disk partition migration.<\/td>\r\nWhen moving to a new system or drive, cloning is a quick and easy way to transfer everything seamlessly. However, cloning to a higher-capacity drive doesn\u2019t automatically extend your partition, as this Redditor<\/a> experienced. Therefore, everything outside your cloned partition will be unallocated space until it\u2019s used.<\/td>\r\n<\/tr>\r\n
Hardware failure<\/td>\r\nHard drives are susceptible to failure. If the hard drive has failed at some point, the partition could have become lost as a result. The moving parts inside the drive also wear down with time, and the sudden appearance of unallocated space is definitely something that can be attributed to degradation over time, which could be the case with this thread<\/a>.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

<\/div>\r\n

🙏 While files that were present before the partition was lost may still remain on the hard drive<\/b>, they just won\u2019t be visible to the operating system as it still reads unallocated space as empty. However, if you\u2019re working with an SSD that has had its partition deleted via Disk Management or DiskPart, you must act quickly to disable TRIM or recover the data. If your SSD sends a TRIM command to the controller, the data will become unrecoverable.<\/div>\r\n

<\/span>How to Recover Data from an Unallocated Space<\/span><\/h2>\r\n

No matter what causes your partition to disappear, there are various methods you can use to recover the data that was lost.<\/p>\r\n

<\/span>Method 1:<\/span> Restore from a Backup<\/span><\/h3>\r\n

If you\u2019ve created a backup of the volume that was lost, or even the data itself, you can use this backup to easily restore the files that were lost. Restoring from backups is the most effective way of getting back all the files that were lost with the most success.<\/p>\r\n

If you\u2019re unsure if you\u2019ve ever set up a backup, here are some of the common backup solutions on Windows that are worth checking to see if they are enabled.<\/p>\r\n