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Hard Drive Is Full without Reason in Windows 10/8/7? Solutions Are Here.


Hard Drive Is Full

No doubt, almost everyone has encountered the full hard drive issue in Windows 10/8/7. Let’s look at a real-life example.

My computer hard drive is getting full day after day. Recently, I can’t restore some programs on it, and some partitions become red. Besides, sometimes, I receive a Low Disk Space warning as "You are running out of disk space on Local Disk (C:). To free space on this drive by deleting old or unnecessary files, click here." I really need help! Can you help me?

In general, with the development of computer technology, hard drives are getting larger and larger, but somehow they always seem to fill up. Moreover, sometimes disk full issue only shows C drive full. When searching this issue online, you will find many users discuss such a topic "my C drive is suddenly full" in Windows 7/8/10. If your computer hard drive is full, you're likely encountering one or more of the situations listed below:

  • The computer is running slowly.
  • You cannot store more large files/data on it.
  • Hard disk drive is not big enough to accommodate all your needs, such as software update/upgrade, install programs.

And then it is possible that you are wondering: Why is my hard drive full Windows 10/7/8? What is taking up space on my hard drive? Generally speaking, it is because the disk space of your hard drive is not enough to store a large amount of data. Besides, if only C drive full issue appears, it is likely that too many applications or files are saved to C drive. So, how to solve such an issue in Windows 10/7/8?

How to Solve Hard Drive Is Full Issue

method 1 Method 1: Empty Recycle Bin

Recycle Bin, a temporary storage place, is used to store deleted files. To be specific, when you delete a file or folder on your PC, it doesn't get permanently deleted—it goes to the Recycle Bin. Therefore, you can free up space by tapping or clicking Empty Recycle Bin if you have files there. However, this way can only free up a bit of disk space for C drive since large files or folders won’t go to Recycle Bin.

method 2 Method 2: Uninstall Some Programs

As we know, the computer must have various programs, which will occupy a lot of space. So well, you can uninstall some programs from the computer if you no longer use them to free up some space to solve hard drive is full issue.

Step 1: Click the Start button, choose Control Panel, click Programs, and then click Programs and Features.

Note: Windows 10 users can also open the new PC Settings and go to System > Apps & features.


Step 2: Right-click the program you don’t need to use and then choose Uninstall button.

Tips, some programs include the option to change or repair the program in addition to uninstalling it, but many simply offer the option to uninstall.


If the program you want to uninstall isn't listed, it might not have been written for this version of Windows. In this case, you can check the information that came with your program, or go to the manufacturer's website. In general, most programs will be installed automatically in the C:\Program Files folder.

method 3 Method 3: Extend C Drive

Once your hard drive is full, the above two methods can only help to increase a bit of disk space but can’t completely solve disk drive full issue to a certain degree in Windows 10/8/7. If you only receive the warning that C drive is running out of low disk space and find there are some other partitions or free space on the same disk, increasing the size of C drive is the best solution to get rid of this warning.

When it comes to increasing C drive size, you can try using Windows built-in Disk Management. However, the "Extend Volume" feature only works with unallocated space on the adjacent right side of the partition you would like to extend. Besides, this feature can only shrink or expand the NTFS partition. So well, turning to third-party partition tool is a good choice for common users.

recommend Hot article: Why Extend Volume Grayed out and How to Quickly Fix It

If "my C drive is full without reason" issue occurs in Windows 10/8/7, you can try using MiniTool Partition Wizard developed by the dedicated software development company. This partition manager provides you with six Editions, thereinto, its Free Edition enables you to easily and effectively increase its size without affecting the original data with its powerful features – "Extend Partition" and "Move/Resize Partition".

Before you do, please download MiniTool Partition Wizard Free Edition, install it on your computer and then launch it to the main interface.

Step 1: Select C partition and choose "Extend Partition" function from the left action panel in the main window of this free tool.

extend c

Step 2: Choose an existing partition (can be any partition except itself and you can choose a suitable one according to partition situations) or unallocated space to borrow free space from and drag sliding button to decide how much free space to borrow. Then, click "OK" to go back to the main interface.

take disk space

Step 3: Click "Apply" to perform all changes.

Video Tutorial for handling low disk space warning case:

If there is some unallocated space next to C drive, you can use "Move/Resize Partition" feature to directly extend C partition in Windows 10/8/7.

recommend Hot article: Two Ways to Extend Partition in Windows 10 without Data Loss

method 4 Method 4: Add Extra Storage Space

If your entire disk is full, a longer-term strategy for expanding your PC's storage capacity is to turn to another removable storage, including external/internal hard drive, SD cards, USB flash drives, DVDs or CDs.

(1) Add another new drive
If your hard drive is full, you can add another external or internal hard drive as a secondary storage device to store data without deleting any files saved on the full hard drive.

(2) Replace the full drive with a large one
If your full hard drive is very small, you may want to consider replacing it with one of a higher capacity. However, if you do decide to do this, you need to reinstall the operating system. In this case, is it possible to replace the full drive with a new one without reinstalling OS in Windows 7/8/10?

Now, fortunately, MiniTool Partition Wizard, this professional yet free disk copy tool can help you to transfer all data as well as operating systems from the full drive to a new one without affecting the original data because of its "Copy Disk" feature. Detailed steps on how to upgrade small old hard disk to larger newer one without reinstalling Windows and all other installed programs are shown here. Before copying disk, you need to connect the large disk to a computer at first.

If you want to copy OS disk, MiniTool Partition Wizard Free Edition can only free copy this disk from MBR to MBR and from GPT to GPT. If you want to clone OS disk from MBR to GPT, we advise you to use its Professional Edition. Click to learn the edition comparison.

Step 1: Here take Professional Edition as an example. After launching MiniTool Partition Wizard, right-click on the full disk and then choose "Copy Disk" from the left action panel.


Step 2: Select the large disk that you will save the copy of the full hard drive and then click "Next" button. Note: It is recommended to backup all important data on this target disk in advance because all its data will be deleted.

select target disk

Step 3: Choose a copying method (fit partitions to entire disk and copy partitions without resize) to decide the layout of target disk and then click "Next". If you choose the first one, all space on the target disk will be taken up. By using the second method, all partitions will be copied to new disk without changing their size.

If you are copying the drive to SSD or advanced format HDD, you had better keep checking the option "Force to align partitions to 1MB". Moreover, "Use GUID Partition Table for the target disk" should be chosen.

review change

Step 4: Then MiniTool Partition Wizard will remind you to change BIOS setting so that your computer can boot from this new and large disk and solve hard drive is full issue. Click "Finish" button to go back to the main interface of this software.


Step 5: Click "Apply" and tap "Yes" to perform all changes. Next, you will be asked to restart now since you are copying system disk. Just do as told.


Now with MiniTool Partition Wizard, you can easily solve C drive full issue by extending/resizing C partition and fix hard drive full issue by copying disk to make a disk upgrade in Windows 7/8/10. If you are interested in this tool, please share it with your friends.

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Four Possible Solutions for Disk Drive Full Issue

method 1 Method 1: Run Disk Cleanup

If "my C drive is full without reason" issue appears in Windows 7/8/10, you can also delete temporary files and other unimportant data to free up hard disk space. And here, Windows includes a built-in tool, Disk Cleanup, to help you clear your disk of unnecessary files.

Step 1: Right-click one of your hard drives in the Computer window and select Properties, and then click Disk Cleanup button in the disk properties window.

(Alternatively, you can click Start button, type Disk Cleanup, and right-click Disk Cleanup and run it as Administrator. After that, select the drive you want to clean up and click OK button. Disk Cleanup scans and calculates how much space you will be able to free on that drive.)

disk cleanup

Step 2: In this window, select the types of files you want to delete and click OK. This includes temporary files, log files, files in your recycle bin, and other unimportant files.

Tips, here, you can click Clean up system files button to delete system files which don’t appear on the list here. Doing this will enable you to delete legacy files from previous installations of Windows, old system restore points and various system log files.

method 2 Method 2: Reduce The Size of The WinSxS Folder

Warning: Deleting files from the WinSxS folder or deleting the entire WinSxS folder might severely damage your system and make it impossible to restart or update your PC.

The WinSxS folder, located in the Windows folder on your PC (for example, C:\Windows\WinSxS), stores the Windows Component Store files, which are used to support functions needed to customize and update Windows. However, over time, you may notice that the C:\Windows\winsxs directory seems to use lots of disk space. This post will tell you everything you want to know.

Now, you can reduce the size of this folder to free up space according to the following steps.

Step 1: Open Control Panel, click System and Security.

Step 2: Tap Schedule tasks under Administrative Tools.

Step 3: Click Task Scheduler Library > Microsoft > Windows > Servicing.

reduce-size WinSxS-Folder

Step 4: Tap StartComponentCleanup, and then tap Run under Selected Item.

method 3 Method 3: Make OneDrive Files Online-Only

As everyone knows, files that are available offline take up more space on your PC, and OneDrive also needs 200 MB of free space on your PC to sync your files. So well, to free up space, you can make some files or folders online-only.


1. If you have accessed all files offline turned on, you need to first turn off this setting before you can make files online-only.
2. If you have pending uploads to OneDrive, you need to wait until they are completed before making files online-only.

method 4 Method 4: Reduce the Amount of Space Used for System Restore

System Restore is a feature in Microsoft Windows that allows the user to revert their computer's state (including system files, installed applications, Windows Registry, and system settings) to that of a previous point in time, which can be used to recover from system malfunctions or other problems. In general, System Restore does this by saving the changes made to system files in a restore point. Therefore, if System Restore takes up a lot of hard drive space for restore points, you can take the following steps to reduce its size. Note, here we take Windows 7 for example.

Step 1: Right-click the Computer icon, choose Properties.

Step 2: Click System protection.

Step 3: Click Configure.

reduce space system restore

Step 4: Now, in this window, you can turn off system protection entirely, delete all but the latest restore points, change it to only restore files (and not settings), or drag the slider to use more or less space.

Tips: you had better leave a decent amount of space—System Restore can help you out of a jam when your computer stops working.

Although these methods can help to free up some hard disk space, they are not the best solutions for the full hard drive since you may continue to store data and files on it. Therefore, if you find your disk is frequently running out of disk space or the recommendations in this section did not help resolve your issue, please ask this third-party free partition manager – MiniTool Partition Wizard for help in Windows 7/8/10.


In a word, if your C drive is full in Windows 7/8/10, you can turn to MiniTool Partition Wizard to easily and effectively increase its partition size to move out the warning. If your entire hard drive is full rather than C only, you can add a new storage device as a secondary drive, and replace the full drive with a new large one to store more data. Besides, we also offer four possible methods, delete some temporary files, uninstall some programs, or reduce the size of WinSxS folder to free up hard drive space.

And, if you have any good ideas or any problems about the full hard drive, please leave comments below or email us via [email protected]. Much appreciated!