Upgrading to 1.4 DEV branch

[piero]

@Wolf29

1/ Can I switch from Stable 1.3 directly to Dev 1.4 ?

Yes

@Wolf29

it seems to be safe to upgrade .zip without upgrading the recovery first.

Yes

@Wolf29

PS: Tried from recovery, but found no way of upgrading from the internal Storage; Only “Apply update from adb”. Specific to S9+ Samsung perhaps.

Perhaps because your internal storage is empty ?
On my Samsung Galaxy s4 :

[HOWTO] an Unified Install Guide Project for /e/

this post is editable as a Wiki. (1) Download an /e/OS build (2) Download recovery-e or TWRP (3) install the appropriate Flashing Tools (4) allow “Non Vendor OS” to be installed on the device (5) Check the communication between the PC and your smartphone (6) Unlock the Bootloader (7) Flash a custom recovery manager on your device (8) install /e/ from your computer, using the “adb sideload” method or (9) Install /e/ without computer using the “Storage Device” method (10) post install…