What is maxium brands per file upload ?

The maximum number of brands or ASINs per upload is 5,000 max per upload. 

If you need to upload a list with more than 5,000 brands please split up the file using software or service such as https://www.splitcsv.com/ or https://filesplit.org/ to split the file into 5,000 lines or small. Then upload one file after the other to get all your custom alerts uploaded. 

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