Windows 10 Network Share External Drive to Android

Question

C:\ Shares can be accessed while D:\ Shares give network errors on Android devices and thus cannot be accessed. (but they do work on windows clients without login) Is there any logging/feedback I can access to find what the problem is ?

Important info: Ownership & Permissions have been changed on the drive in the past, but have been set back to SYSTEM.

Folder on C:\ (NVME SSD)

• Folder Permissions: Everyone \ Full Control
• Share Permissions: Everyone \ Full Control
• Owner: Me (Microsoft Account)

Folder on D:\ (EXTERNAL HDD)

• Folder Permissions: Everyone \ Full Control
• Share Permissions: Everyone \ Full Control
• Owner: Me (Microsoft Account)

Network Settings:

• Network is Private
• Network discovery is turned on
• File & printer Sharing is turned on
• Use user accounts and passwords to connect to other computers
• Password protected sharing is turned off

Answer 1

To awnser my own question:

To view networking errors you can use the Windows Event Viewer:

Start > Event Viewer > Windows Logs > System

There I found out that "srv" was spewing errors when I wanted to access the share:

"The server's configuration parameter "irpstacksize" is too small for the server...blabla"

Additionally when using some android file managers they actually present you with an error code instead of giving a generic "network error". In my case it was error 0xC0000205

SOLUTION

Open Regedit and go to

HKEY_LOCAL_MACHINE\Systen\CurrentControlSet\Services\LanmanServer\Parameters

Add or set "IRPStackSize" (case sensitive) to a higher number

(decimal range 11 - 50, default == 15)

Reboot or manage to restart all Lanman related services & PRESTO, working android accessible shares !