File uploader

Main Reasons for Unable to Attach in NotebookLM

When trying to attach files in NotebookLM, there may be instances where the upload does not progress or errors are displayed.

In many cases, this is not due to issues on the service side but rather problems with file format, size, or the file itself.

First, let's check the following items.

• Uploading an unsupported file format
• Exceeding file size or character limits
• Using password-protected PDFs
• Issues with sharing permissions on Google Drive
• Temporary outages occurring on the NotebookLM side

Checklist to Confirm Initially

• Check if the file is of a supported format
• Confirm that the file size is under 200MB
• Ensure that the source is within 500,000 words
• Check if the PDF has password or copying restrictions
• Verify Google Drive sharing permissions
• Test uploading with another file
• Try uploading again after some time

Cause 1: Unsupported File Format

NotebookLM supports various formats but cannot read all files.

The main supported formats are as follows.

• PDF
• Word (docx)
• PowerPoint (pptx)
• CSV
• TXT
• Markdown
• Google Docs
• Google Slides
• Google Sheets
• Web page URL
• YouTube URL

Compressed files such as ZIP or RAR cannot be uploaded directly. Unzip them and load the individual files. Often, simply converting to a supported format resolves the issue.

Cause 2: Exceeding File Size and Word Count Limits

NotebookLM has limitations for each source.

• Maximum 200MB per file
• Maximum 500,000 words per source

Even if the size is under 200MB, if the word count exceeds 500,000, the upload will fail.

For large documents, splitting them into chapters or sections may allow for successful loading.

Cause 3: Password-Protected PDFs

Some PDFs have restrictions against copying or viewing.

Such PDFs may fail to upload because NotebookLM cannot analyze the content.

This is particularly common with e-books or paid materials, so consider converting to Word or text format if the original data is available.

Cause 4: Google Drive Access Permissions

When reading files from Google Drive, it's necessary to have permissions that allow NotebookLM to access them.

Failure to load may occur if viewing permissions are lacking or if sharing settings have been altered.

For files being collaboratively edited, reloading after changing permissions may resolve the issue.

Cause 5: Temporary Issues on the NotebookLM Side

Occasionally, there may be outages on the NotebookLM side where no files can be uploaded.

If the same symptoms occur across multiple browsers or different accounts, it may be a service-side issue.

In this situation, as it cannot be resolved by the user, waiting and trying again later is the most reliable course of action.

Alternatives When Unable to Attach to NotebookLM

Even if you cannot upload directly to NotebookLM, there are situations where sharing materials with others is desirable.

In those cases, using a free file uploader like UploadF allows for easy sharing.

• No membership registration required for immediate upload
• Supports drag and drop
• Available for both smartphone and PC
• Supports password-protected sharing
• Also offers convenient features like image editing and OCR

This is convenient for temporarily sharing files that cannot be used in NotebookLM or for sending materials to others.

Frequently Asked Questions

Q. I cannot upload even though it is a PDF.

PDFs that are copy-protected or have special internal structures may not be readable. Converting to another format may resolve the issue.

Q. It fails even though it is under 200MB.

There is a 500,000 word limit as well as the size limit. Please split large documents containing many texts for loading.

Q. Can I upload using my smartphone?

Yes, but some features may be limited compared to the PC version. If it does not work well, trying from a PC browser is also recommended.

Conclusion

Many reasons for unable to attach in NotebookLM relate to supported formats, size limitations, copy protection, and access permissions.

First, check the file format and size; if problems persist, it may be possible to resolve by splitting the file or converting to another format.

Additionally, if you only need to share materials with someone, using a free file uploader like UploadF allows smooth file transfers, regardless of PC or smartphone.

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