Hi nadz,
Never shoot timelapse with a normal remote but use an intervalometer. Your camera stops because the camera buffer gets filled after 100 pictures. Faster card will not help although it will take few more pictures before the buffer is filled. With an intervalometer you can shoot endless frames till your battery runs out.
I'll give you some tips for star trails.
First open up your lens aperture to max, yours I guess is f/3.5. Use ISO 3200 and shutter speed 30 secs. In the intervalometer set your interval time to 37 secs. or for safer side 40 secs. And take about 500 frames. (Actually when you set 30 secs shutter in camera, it shoots 32 secs and adding 5 secs for for writing to the memory card.)
Very important, keep your lens to manual focus and take your time to focus properly. Use a bright star using the live view magnified or any distance artificial light. Switch off the D-lighting, High ISO noise reduction and Long Exposure Noise Reduction. Also disable if there is any Lens correction. And I am sure you are shooting in raw.
Then I guess you know how to merge them in post.
If you have any difficulty let me know.
Henry