Collection shows fewer media than the number of files uploaded

💻 Environment/Context

• Upload
• Collections

❓ Issue/Question

• The upload screen shows Hooray, your upload is in! We're processing X files. but the collection shows fewer media than that number
• The platform said the file is uploaded, but it's not in the collection

👌 Resolution/Answer

• Check whether the missing files are duplicates
  • Compare the file names in your upload folder with the media in the collection
  • Look for copies of the same photo with a number added to the name, such as DSC_0073.jpg and DSC_0073 (1).jpg
  • If the collection has one copy of each missing file, nothing was lost: ScorePlay kept one copy and removed the duplicate
    • How does merging duplicates logic work on ScorePlay? 
• Upload the same file again on purpose
  • Make a small change to the file and save it. Any change, even an invisible one, gives it a new hash
    • How deduplication works using File Hashes?
  • Upload the changed file to the collection again
• If you can't find a copy of a missing file in the collection, reach out to the ScorePlay Support team via Live Chat with the collection link and the file names

🥚 Cause

• The upload count includes every file you selected. Deduplication then removes files that are identical to another file in the same upload or to media already in the collection
• ScorePlay spots duplicates by the file's hash, a fingerprint of its content, so a copy is removed even with a new name

🔖 Notes

• Duplicates often come from downloading or copying the same photos twice, which creates files named X (1).jpg or X (2).jpg
• If you upload the same folder to a collection again, files already in that collection are also removed as duplicates
• Uploading a photo that is already in the collection creates a duplicate