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How to Search and OCR PDFs Across Multiple Hard Drives
Question details
The user needs a method to locate and make searchable (via OCR) scanned PDF documents scattered across several physical hard drives.
- Product
- PDF Software
- Device & OS
- Windows
- Scenario
- Organizing, indexing, and retrieving scanned PDF documents from numerous disconnected or old hard drives.
- Observed behavior
- The target PDFs exist on the drives as unsearchable scanned images, requiring both an Optical Character Recognition (OCR) process and a robust indexing solution to be easily discoverable.
Ensure all external hard drives are properly connected to your computer via USB or SATA and assigned drive letters so that your operating system and indexing software can recognize them.
Perform Batch OCR and Build a Searchable Index
Make scanned PDFs searchable using professional OCR software, then use file-indexing tools to search across all connected drives simultaneously.
If your PDF files are scanned documents, Windows or standard desktop search tools cannot read the text inside them. You must first convert the images into readable text using Optical Character Recognition (OCR). Once the files are searchable, you can build a unified index.
Plug in all the hard drives you wish to search and open Windows File Explorer to verify that each drive is mounted and accessible.
Open a professional PDF editor with batch processing capabilities. Select the folders on your hard drives containing the scanned PDFs and run the OCR tool to convert the image text into searchable document content.
Open Windows Indexing Options or a third-party desktop search utility. Add the directories of your newly connected hard drives to the indexing locations.
Once the index is built, open your file search tool, type your specific keywords into the search bar, and the tool will rapidly locate the PDFs containing your text across all drives.
Use WPS Office to OCR and Manage Your PDFs
WPS Office provides built-in, powerful OCR capabilities to convert scanned PDFs into fully searchable and editable documents, making it easier to manage files across multiple drives.
- 1. Open WPS Office: Launch WPS Office on your PC and navigate to the 'PDF' tab.
- 2. Load your scanned PDFs: Click 'Open' and select the scanned PDF documents located on your connected hard drives.
- 3. Apply OCR: Navigate to the 'Tools' menu on the top ribbon and select 'OCR'.
- 4. Convert to Searchable PDF: Choose the option to convert the document into a searchable PDF and confirm the operation.
- 5. Save the changes: Save the updated PDF file. Your desktop search tools will now be able to read and index the text within.
Frequently Asked Questions
Does Windows Search automatically index external hard drives?
Not by default. You need to open 'Indexing Options' from the Windows Start Menu, click 'Modify', and manually check the boxes next to your connected external hard drives to include them in the system's search index.
What is the fastest way to search through multiple hard drives?
Third-party indexing utilities are often much faster than native Windows Search for locating file names. However, for searching inside the actual text of PDF files, you must ensure 'content indexing' is enabled in your search tool.
Why can't I search the text inside my PDF?
If the PDF was created directly from a scanner, it only contains a picture of the text. You must use software with an OCR (Optical Character Recognition) feature to convert those images into actual, readable text characters before you can search it.
Can I batch OCR multiple PDFs at once?
Yes, professional PDF editors like WPS Office Premium offer batch OCR tools. This allows you to select entire folders across your hard drives and automatically apply text recognition to all contained PDFs without opening them individually.
