If you provide more details about the audience or the purpose of the files, I can give you a much more tailored draft.
Use this if you are asking for help or describing a technical process involving .txt or .csv sale files.
"I am currently working on a script to import several into our main database. The files are formatted as plain text and need to be sanitized to ensure all transaction IDs are unique before the final upload."
Use this for a quick update to your manager or team regarding your workload.