FTP per upload limit causing bottleneck / slow down

I am just starting to try to set up FTP server/clients using Filezilla. Everything seems to be working, but the Filezilla client maxes out around 200KiB/s per upload. My upload bandwidth can support 5+ simultaneous transfers at this speed. however, I would like to transfer one large 70Gb file (ideally without breaking it into smaller pieces). Is there some setting that makes a max speed per individual upload? I have tried multiple clients as well (FireFTP, CuteFTP etc.) and the same thing happens. Or is there some way to check if the ISP is causing this?

I also find strange that if I upload the file to a service like Dropbox or Google Drive, I can get speeds of about 2000KiB/s. It is only with FTP that this 200 KiB limit seems to happening.

Last- I don't believe it's an issue on the server side since I confirmed that someone else (from another computer, another IP etc.) was able to upload a single file to that server at far greater than 200KiB/s, however I have not been able to figure out what is different about their configuration.

Any suggestions would be greatly appreciated.

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