Hi RoShmi,
I had a working version of FTP server with WIO Terminl, but I change the library to manage SD, I activate Library SdFat version >= 2.0.2 .
And now working good.
I pushed the updated example and updated FtpServerKey.h, you must add the library upper and all go well.
So I think there is a bug on scope of Seeed_SD library, but I think It’s difficult to explain in a issue on github, if you have some additional information to create a good issue on https://github.com/Seeed-Studio/Seeed_Arduino_FS write here so I’m going to integrate the information.
thanks Renzo