> ## Documentation Index
> Fetch the complete documentation index at: https://docs.occtoo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Upload a fixed segment

> Create a fixed segment from a CSV list of entry IDs.

When you already have a list of entries, choose **Fixed · quick upload** as the segment type. Studio matches the IDs in your file against the entries on the card and builds a fixed segment from the matches.

<img src="https://mintcdn.com/occtoo/wN0Q8dzkUYyKx0Sj/images/guides/studio/segments/fixed-upload-step-focus.png?fit=max&auto=format&n=wN0Q8dzkUYyKx0Sj&q=85&s=0a4a75cd3577abbd20d34c9a8f803e07" alt="Upload your segmentation list step" width="494" height="519" data-path="images/guides/studio/segments/fixed-upload-step-focus.png" />

<Steps>
  <Step title="Prepare the file">
    * Acceptable file formats: CSV
    * The file cannot exceed 65,000 entries
    * Each entry should occupy a separate row
    * The first column is read as the entry ID

    <Info>
      Duplicate and empty rows are ignored.
    </Info>
  </Step>

  <Step title="Upload the file">
    Drag the file onto the upload area or press **browse** to pick it. Tick **The file includes column headers in the first row** if your file has a header row.
  </Step>

  <Step title="Check the result">
    Studio uploads the file and cross-references the entries. The summary tells you how many IDs were matched:

    * All entries matched — the segment is ready.
    * Only some entries matched — the unmatched IDs are left out. Press **Download unmatched entries** to get them as a CSV.
    * No entries matched — nothing can be created from this file. Check that the file holds entry IDs from the selected card.

          <img src="https://mintcdn.com/occtoo/wN0Q8dzkUYyKx0Sj/images/guides/studio/segments/fixed-upload-summary-focus.png?fit=max&auto=format&n=wN0Q8dzkUYyKx0Sj&q=85&s=4904d9ccdb2d5ccbf759cca6cc104dde" alt="Upload summary with matched and unmatched entries" width="576" height="485" data-path="images/guides/studio/segments/fixed-upload-summary-focus.png" />

    Press **Next** to open **Review and manage your uploaded entries**. This step lists only the matched entries, each with a ticked checkbox — untick one to drop it from the segment. There are no tabs, no search and no filters here: it is the uploaded selection and nothing else.

    <img src="https://mintcdn.com/occtoo/wN0Q8dzkUYyKx0Sj/images/guides/studio/segments/fixed-upload-review-focus.png?fit=max&auto=format&n=wN0Q8dzkUYyKx0Sj&q=85&s=6eafac32b7cda60e0c23c4529d3e451c" alt="Review and manage your uploaded entries" width="1500" height="620" data-path="images/guides/studio/segments/fixed-upload-review-focus.png" />
  </Step>

  <Step title="Save the segment">
    Press **Save segment**, which shows the entry count it will save, for example **Save segment (5 entries)**. The result is a fixed segment: the entries stay as they are, even when the underlying data changes.

    Press **Back** to return to the upload step if you want to start from a different file.
  </Step>
</Steps>

## Update the entries of an existing segment

Open a fixed segment, press **Edit segmentation**, then press **Upload entries** and pick a new file. In edit mode you also choose what happens to the entries already in the segment:

* **Replace all entries with the upload** — the uploaded list becomes the segment.
* **Append new entries from the upload** — the uploaded entries are added to the existing ones. Entries that are already in the segment are ignored.

<Warning>
  Going back from the upload step erases the current upload, and you have to
  upload the file again.
</Warning>