You mean you are unable to start the away mode or it is started but the lamp never comes on and on randomly? it works fine on only android phone with kasa 2.0.0

You can all, email or chat with tplink support. https://www.tp-link.com/us/support/contact-technical-support#Hotline-Support

the format of your HDD is one of these: ntfs/fat32/exfat/hfs+? does it have external power supply? if not, make sure power required is not over 500mA for USB 2.0 port. may be a compatibility issue,...

uh...I think you can see the power button turning green/on or grey/off during the period you set if away mode takes effect

contact tplink support for a solution

but reset works? after the extender is reset, before the configuration, what password do you enter? what does the login window look like?