How do I disable Connected Standby on Windows 10

You should take advantage of Connected Standby / Modern standby for Windows 10 as only modern applications that are registered can send a limited amount of network traffic at a scheduled interval, which means Connected Standby generally offers benefits. However if you want to use basic sleep instead, you can disable the feature in registry edit:

1. Start the registry editor (regedit.exe).
2. Move to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power.
3. Double-click CsEnabled and set to 0, then click OK.

S3 = Basic Sleep
S0 = Modern Standby