[PROBLEM] HDD not dected

[spiros79]

Hi spiros79,
I think is a power problem: why don't you try to disconnect everything but the hdd (directly connected to the usb male to female adapter).?
Regards,
Francesco

I could try that but it's a not a working solution because  I need the adapter to connect at least two devices , a hard disk drive and the dac . So I need the hub . Another solution would be to try a hub with external supply which I don,t possess nor  I have ever seen .Power supply would be a problem if I asked for the zero to spin the drive . But as long it's self powered  , power  should not be  the issue . I will also check the adapter . If it is OTG , does this mean that the pi necessarily as a host  powers the HDD through the port and leaves the power supply aside   ?

Thanks