Why my local pc to seedbox speed os not crossing 5MBps with SFTP using any major ftp clients.

whn i use FTP its giving me 300mbps as i have1 gbps fiber connection. but the catch is that it's failing large file upload at 80% and giving error as connection aborted.

e.g. for 15GB file upload from local pc to seedbox it's failing at 10GB as connection drops.

Kindly help me , if i have to do any setting change with filezilla or my firewall , i am new to file upload to seed box.

Use WinSCP, configure it to save the config to an ini file and change the background transfer count to like 20-30. It won't speed up single file transfer, but will speed up multi file transfers. And you can always put any content uploadable to a seedbox to a 7z archive split every 500MB and then extract it on the seedbox that way getting access to the multi file upload speed even if you only want to upload a single file. To speed up the archivation process you can set the compression level to 0 - Store so it would just split the file instead of compressing it, which is significantly faster than the default compression level.