Ok just to recap:
I've bought 3 of these 2670L, just in case I bought 2 at 4launch.nl and 1 via bol.com, both dutch stores.
IP Camera Name	DCS-2670L-TUIN
Time & Date 	Sun Jan 20 20:3:31 2019
Firmware Version 	2.00.02
Hardware Version	B
MAC Address 	B0:C5:54:XX:XX:XX
IP Address 	192.168.178.11
IP Subnet Mask 	255.255.255.0
Default Gateway 	192.168.178.1
Primary DNS 	84.116.xx.xx
Secondary DNS 	84.116.xx.xx
PPPoE 	Disable
DDNS 	Disable
Agent Version	2.2.0-b25Dutchhttps://eu.dlink.com/nl/nl/products/dcs-2670l-full-hd-180-outdoor-wifi-camera
1.10.02    Firmware    8-11-2017
UKhttps://eu.dlink.com/uk/en/products/dcs-2670l-full-hd-180-outdoor-wifi-camera
1.10.02    Firmware    08/11/2017
Canadahttp://support.dlink.ca/ProductInfo.aspx?m=DCS-2670L * only notes hardware version A
2.00.02 Firmware 06/07/18
ftp://ftp2.dlink.com/PRODUCTS/DCS-2670L/BETA/ (found in this thread)
V2.01.03 -> DCS-2670L_A1_FW_V2.01.03(1030103739).bin
IP Camera Name	DCS-2670L-TUIN
Time & Date 	Sun Jan 20 20:19:54 2019
Firmware Version 	2.01.03
Hardware Version	B
MAC Address 	B0:C5:54:XX:XX:XX
IP Address 	192.168.178.11
IP Subnet Mask 	255.255.255.0
Default Gateway 	192.168.178.1
Primary DNS 	84.116.xx.xx
Secondary DNS 	84.116.xx.xx
PPPoE 	Disable
DDNS 	Disable
Agent Version	2.2.0-b25n
I can confirm it comes back online, I have not yet tested the rest
-- EDIT --
I can confirm the FTP does work now! Going to update/upgrade the others cams too 

-- EDIT --
Sadly enough, only the first cam is working as it should be, the other 2 don't actually write to FTP
-- EDIT --
It looks like there is a limitation on the length of the account name for the ftp
If I switch the frontdoor(voordeur) cam to the garden (tuin) it does work...
The camera_oprit and camera_voordeur don't work, the camera_tuin does work, the strangest thing of all is that on all accounts the IPCamTestFile.txt file is set