Large CSVs

Hi,

I have a company who receives occasional large csv files 90M records from their clients.  When I uploaded the CSV using the FTP extractor (file was on an FTP server), it took 1.5 hours to upload. 

What would you recommend to shorten the 1.5 hour process?  Use a different method to store the file? Use preprocessors?  etc..?

Please note that this process needs to be automated and I can instruct the company to adopt a new process to accepting large CSV files from their client.  

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