How to upload files to DeepSeek and check the result

DeepSeek supports file uploads in consumer chat, as its official upload troubleshooting↗ (opens in a new tab) confirms. Use the upload control available in your chat to choose the document, then ask a narrow question and check the answer against the original. The public FAQ does not give an exact English attach-button label or a full menu path, so this guide does not invent one. fenbs helps you keep the checked findings and next step after the file-analysis session ends.

How should you prepare the file and your question?

Start with one document you are allowed to share and can open yourself. Give it a name that distinguishes the version you want reviewed. If two drafts have similar names, identify the date or revision in your request so you can check later which source the answer was supposed to use.

Choose a question small enough to verify. “Find the delivery dates in this proposal and show their section headings” is more useful for a first check than “analyze everything.” Keep the original open nearby. You should know where at least one expected answer appears before asking the assistant to find the rest.

Remove unrelated material before sharing when you can do so without damaging the source. Follow your organization’s rules for confidential documents. A convenient upload workflow does not determine whether a document belongs in that service; make that decision before sending it.

What is a careful first upload workflow?

1. Open the DeepSeek conversation where you intend to ask about the document. Use the file-upload control shown in that chat to choose your prepared file.
2. Check the visible upload result before asking for analysis. If the file did not finish uploading or an error appears, resolve that before treating any response as document-based.
3. Name the file and the specific question in your message. Ask for source locations such as headings, table names, or short passages you can find yourself.
4. Tell the assistant to mark missing or unreadable material instead of filling gaps with guesses. Keep the first question focused on extracting facts from the file.
5. Compare the response with the original document. Only then ask for an interpretation, recommendation, or next draft.

Those steps describe a checking method, rather than an undocumented button sequence. If you cannot identify a file-upload control in your interface, consult the official help instead of following another app’s attachment instructions. The FAQ establishes that uploading exists, but does not establish identical controls or entitlements across every platform.

How do you check that the answer follows the document?

Separate what the document says from what the assistant thinks it means. Ask for the relevant passage or location beside each factual finding. Then read that location yourself, including the surrounding paragraph or table heading. A correct-looking phrase can still refer to the wrong draft, time period, or part of a table.

Use only the uploaded document for this answer. List the stated delivery dates with the relevant section heading or table name. Separate exact statements from your interpretation. Say when information is absent or unreadable. Do not infer a date that the document does not give.

For a proposal, check whether a date is a firm commitment or only an example. For a table, check its units and footnotes before accepting a total or comparison. If the answer combines several passages, trace each one. These are practical review steps you control, rather than a promise that uploading makes the answer reliable.

Keep a short list of confirmed findings and unanswered questions. The prompts for DeepSeek guide helps with narrowing follow-up requests. Save useful checks with the work in fenbs so a later session does not treat an unverified interpretation as an established fact.

What should you check when an upload fails?

The official FAQ lists several possible causes: unsupported format, unstable connection, too many files, excessive file size, content that cannot be parsed, or content that violates the service’s terms. It does not give numeric consumer upload limits. Use the actual error and current official help rather than copying limits from an API tutorial.

• Open the original locally. If it is damaged or unreadable there, address that before retrying.
• Try one appropriate file instead of resending a collection. Record whether the failure happens during selection, transfer, or analysis.
• Check your connection and the DeepSeek status page↗ (opens in a new tab), which lists file-upload service separately from other services.
• If selecting a file produces no response on a company or school network, check with the network administrator. The FAQ identifies local network restrictions as a possible cause.
• When asking for help, share the error description and a harmless example if allowed. Do not post the private document just to demonstrate the failure.

A status page is a useful clue, not proof that your particular file can be processed. If the upload succeeds but the answer misses a section, return to the source checks above. Changing network settings will not by itself establish that the assistant read a footnote correctly.

What should you keep after reviewing the file?

Keep the source version, the question you asked, the checked answer, and the remaining uncertainty together. If you changed a recommendation after reading the original, record the correction. A future reader should be able to tell which parts came from the file and which parts were your own judgment.

For example, you might keep “The draft says delivery is subject to supplier confirmation; ask the supplier before promising a date.” That is more useful than an isolated answer saying a delivery date is certain. Preserve the source location that justified the correction, so someone can inspect it without searching the entire chat.

Do not confuse a document upload with lasting knowledge across future sessions. The separate DeepSeek memory guide covers that work record, while the DeepSeek context-window guide addresses how much material a session can use. If you also want a conversation archive, follow the DeepSeek export steps without assuming the archive includes attachments.

How to keep checked findings with fenbs

Save what lets you carry on from exactly where you left off, on any device and in another AI. Keep the original document in the place approved for it, and keep the useful work record in fenbs. You can record what was checked without copying the entire source into another tool.

1. Create a free account.
2. Add a task for the question you need to resolve, such as confirming the delivery terms in a proposal.
3. Write the source version, the findings you checked, and the questions that remain. Save only information you are allowed to keep there.
4. Before stopping, write the next step. When another AI helps, give it the current record and the approved source material it needs.

fenbs does not upload files into DeepSeek or verify the document for you. If you only need one answer from one harmless file, a local note may be enough. fenbs helps when those findings must guide more work later. See the AI at work hub for more practical ways to keep useful results.