How to Optimize Word Cache for SSD

If you use Word on a computer with a solid-state drive, you may notice that the application still feels sluggish when opening files or saving documents. The default cache settings in Word are designed for traditional hard drives, not for the faster read-and-write speeds of an SSD. This article explains which cache-related settings you should adjust to reduce unnecessary write cycles and improve performance. You will learn how to modify the Office Document Cache, disable automatic save locations that cause extra writes, and configure Word’s file-saving behavior to match your SSD.

Why Default Word Cache Settings Can Slow Down an SSD

SSDs have a limited number of write cycles before the memory cells degrade. Word’s default caching behavior was built for hard disk drives, which can handle many small writes without performance loss. When Word writes temporary files for AutoRecovery, the Office Document Cache, and background saves, it creates extra writes on the SSD. Over time, these writes can reduce the drive’s lifespan and cause slowdowns as the SSD’s controller works harder to manage the cache.

The Office Document Cache stores copies of files you open from SharePoint or OneDrive so that Word can open them faster later. However, on an SSD, the performance gain is minimal because the drive already reads data quickly. The cache files also take up space and generate write operations every time you save a document. By adjusting the cache settings, you reduce the number of unnecessary writes and free up storage space.

Another factor is the AutoRecover feature, which saves a backup of your document every few minutes. By default, Word saves this file in a temporary folder on the system drive, which is often the SSD. Changing this location to a secondary drive or a RAM disk eliminates those repetitive writes from the SSD.

Steps to Optimize Word Cache for SSD

Follow these steps in order. Each change reduces the number of write operations Word performs on your SSD. You do not need administrator rights to make these adjustments unless your IT policy restricts settings.

Disable the Office Document Cache

1. Open Word and go to File > Options
   Click the File tab in the top-left corner, then select Options at the bottom of the left pane. The Word Options dialog box opens.
2. Select Advanced in the left pane
   Scroll down to the Save section. Look for the checkbox labeled “Allow background saves”. Uncheck it to stop Word from saving cached copies in the background. This setting alone can cut write operations by up to half.
3. Disable the Office Document Cache
   Still in the Advanced section, find the heading “Office Document Cache”. Uncheck “Use Office Document Cache” if it is present. In Word 2019 and Microsoft 365, this option may not appear in the UI. If you do not see it, proceed to the next step.
4. Clear the existing cache files
   Close Word. Open File Explorer and navigate to %LOCALAPPDATA%\Microsoft\Office\16.0\OfficeFileCache. Delete all files in that folder. The number 16.0 may differ if you use an older version of Office. This action removes old cached copies that are no longer needed.

Move the AutoRecover Folder to a Secondary Drive

1. Open Word and go to File > Options
   Click the File tab, then Options.
2. Select Save in the left pane
   Locate the field labeled “AutoRecover file location”. The default path is usually C:\Users\[YourName]\AppData\Roaming\Microsoft\Word\.
3. Change the path to a secondary drive
   Click Browse and select a folder on a secondary hard drive or a RAM disk. If you have a second internal drive or an external USB drive, create a folder named WordAutoRecover there. Select that folder and click OK.
4. Increase the AutoRecover save interval
   In the same Save section, change “Save AutoRecover information every X minutes” to 15 or 20 minutes. The default is 10 minutes. This change reduces the frequency of automatic saves and the associated write operations.

Disable Hardware Graphics Acceleration

1. Go to File > Options > Advanced
   Scroll down to the Display section.
2. Uncheck “Disable hardware graphics acceleration”
   Wait — the label is confusing. You need to check the box that says “Disable hardware graphics acceleration” to actually turn off the acceleration. When this box is checked, Word uses software rendering instead of the GPU. This reduces memory writes on the SSD because the GPU no longer writes temporary frame data to the drive. Click OK and restart Word.

If Word Still Writes Too Many Temporary Files

After applying the main changes, you may still see Word creating temporary files on the SSD. These files often appear in the same folder as the document you are editing. The following fixes address this behavior.

Word Creates .tmp Files in the Document Folder

Word creates a temporary file with a .tmp extension when you open a document. This file is used for crash recovery. To reduce the writes, save your documents to a folder on a secondary drive instead of the SSD. Alternatively, use the Save As command to store the working copy on a different drive. The temporary files will then be written to that drive.

Word Saves Every Time You Click Save — Even if Nothing Changed

By default, Word rewrites the entire document file when you click Save, even if you only made a small change. To avoid this, enable the “Do not save changes to the Normal template” option. Go to File > Options > Advanced. In the Save section, check “Prompt before saving Normal template”. This setting prevents Word from writing to the Normal.dotm template file each time you save, which reduces write cycles on the SSD.

Word Keeps Multiple Undo Levels That Write to Disk

Word stores undo information in memory, but very long documents may force the undo data to be written to a temporary file. To reduce this, limit the number of undo levels. Go to File > Options > Advanced. In the Editing options section, change “Maximum number of undos” from the default 100 to 20. This setting reduces the amount of data that Word may write to the SSD during complex editing sessions.

Word Cache Settings Comparison: Default vs Optimized

Setting	Default Behavior	Optimized for SSD
Office Document Cache	Enabled — caches files from SharePoint and OneDrive	Disabled — no cache files written to SSD
AutoRecover save interval	Every 10 minutes	Every 20 minutes
AutoRecover file location	System drive (SSD)	Secondary drive or RAM disk
Background saves	Enabled	Disabled
Hardware graphics acceleration	Enabled	Disabled
Maximum undo levels	100	20
Normal template save prompt	Disabled	Enabled

After applying these optimizations, Word performs fewer write operations on your SSD. The drive runs cooler, lasts longer, and the system feels more responsive during file operations. To verify the changes, open Task Manager and watch the disk activity column while saving a document in Word. You should see significantly lower write activity compared to before the adjustments. For further optimization, consider moving your entire Office installation to a secondary drive if your SSD is small or heavily used.