How to Repair and Restore Unallocated Space on a USB/SD Card

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Have you ever met this problem that your SD card or USB drive suddenly shows as unallocated or even stops working on your Computer! Afterward, you can neither access data nor save new data on it. Many users have encountered the issue that a used storage device, like a hard disk, USB, SD card, or pen drive, is missing under File Explorer & is marked as "Unallocated" in Disk Management, which is quite confusing & annoying.

The commonest reasons are deletion and virus attack. For Ex, you may accidentally delete the partition on the USB, or some program does this for you. It is also possible that you were doing some operations that required you to delete partitions but you did not realize it. Besides, it isn't surprising that malicious virus attacks may bring various negative results, including a USB becoming unallocated.

In such cases, data loss always coincides with the partition's change to unallocated volume. Fortunately, you can repair an unallocated USB or SD card and retrieve your files with recovery software.

If the USB or SD Card is brand new or you have no intention to perform data recovery, you can create a new partition using the allocated space directly to make the space usable.

in this article, you'll learn the steps to Fix and Repair an Unallocated USB or SD Card. use these steps.

01. Connect or insert the USB or SD card into the computer.

02. Right-click the Windows icon.

03. Click "Disk Management".

04. Right-click the unallocated space & choose "New Simple Volume".

05. Follow the wizard to finish the remaining process.

You can also partition an unallocated USB Driver or SD card using third-party software.

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THANK YOU! I was freaking out cause I had so much important data on mine

scarterc
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Thank you so much for your good explanation really i am thankful to you 🙏🏼

WithLoveAshok
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Thank you very much, thanks to you my micro sd has completely recovered😭🙏

mdzikriabdillah
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hey i tried this method but it showed "data error (cyclic redundancy check)". Please help me

abhinavs
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Is there a way to do this without formatting it because I've already tried formatting it and then I tried to load something onto the card and the disk space became unallocated again

IvoryTaurean
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what if you right click and choose simple volume, but then the wizard doesn't show up?
because that is exactly what mine is doing right now

jcdgaming
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Hello dear, my 64 GB USB has 16 GB allocated now by following the process, but still 42.5 GB remains unallocated, and when I try to repeat the same process, it said: there is no available space for the operation, please Help..
Shall be really thankful.

zeeshanhaider
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Working but showing format option i clicked on format ... Windows can't format this ?

Abdulazeemtalks
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Not working bro... The system cannot find the file specified... That shown on Display laptop

srimathitheertham
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How do i repair this on the same micro sd card? it is 119 GB but has 29 GB Unallocated.

SoulerClash
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Nice my sd card is working now after i format it thanks
but i have a new problem it auto delete the music i install on it

yokaik