LRTimelapse Forum

The name does not matter, it is the file format that counts. Is that a MR3020 or MR3040? What is the router version?
Did you checked your router like described here: https://dslrdashboard.info/phpBB3/viewto...f=5&t=2101
What is the output of the OpenWrt 'syslog' ?

Die softwareversion. 1.2.0 0.9.1 v0001.0 Build 171206 Reĺ.666 18n
Hardwareversion TL-MR3020 v3 000000001
 sonst konnte ich nichts finden Ist es möglich mir Deutsch zu schreiben da ich auf Englisch nicht so gut bin und mit der Technik auch nicht so geübt bin
Vielen Dank

Unfortunately my German isn't that good.
From what you wrote I guess the problem is that you have the MR3020 V3 that is not yet fully supported by OpenWrt and currently will not work.