Try to disable the Secure Sharing to check again if you can access the HDD. - This was done by Tikona tech support person but that didn't help

Meanwhile, please try to make the drive or folder name as simple as possible, just words without special symbol - Its kept as Alphabet "G".

below are my findings & observation -

- when i check properties, the path which was seen is "ftp://1106947596@192.168.0.1:21", in which 1106947596 is the username for read & write secure login.

- even after deleting the credentials from windows credential manager, still the username was showing in properties, whereas secure sharing was turned off

- even if i change the username and kept it as AX73, remapped ftp again but that didn't change the properties of ftp and was seen as "ftp://1106947596@192.168.0.1:21"

so above concludes that there are bugs which shows that are not changing the values or feature like secure sharing are disabled but in actual they are not changed or disabled

@Kevin_Z  thank for understanding the issue and escalating the issue. There are few issues I have come accross. Am sharing below in pointers

- many features when searched appears in router  admin page but when hyper link is clicked that feature is not available 

- for example, if I search wan redirect which is to enable or disable WAN down page to be either redirect to tplink router login or go to normal page. 

- features like adding username or deleting username in USB storage tab

- in AX50, when a usb was connected irrespective of my mobile being connected on same wifi or not, I was able to access ftp using the static Ip instead of default 192.168.0.1 on android phone and also was able to see an IP assigned for usb connected in dhcp and mac binding pages. But in ax73 can't use the static Ip when connected to same wifi network but was able to read usb using 192.168.0.1 and as soon as I disconnected wifi and went on mobile internet i was abke to read usb via ftp using static ip

@Kevin_Z  support engineer connected with me and updated FW on a beta version and collected logs to share with R&D team. he advised that he needs time to get a fix on a stable version and also out of 2, 1 issue of ftp read\write issue is resolved on beta fw. 2nd issue of seamless connection between FTP when shifted from Open internet to home network due to some NAT issue is being worked upon and they are working on it & will take time.

sure @Kevin_Z 

@Kevin_Z I have the same issue on FTP ? Do you know when new FW version will be available ?