So long samples work fine, but if they don’t fit in the 1/8 division then you can do a few of different things.

If you change patterns and another trig isn’t triggered, the sample will continue to play until it’s finished.
Loops work the same way, but continue looping until another trig is triggered.
This approach is fine if your song plays continuously through patterns predictably.

If it doesn’t ie you want to go to a pattern that’s halfway through your long samples you will have to use slices. Slice the sample in half or quarters for example, and then program each applicable slice in the patterns.

You could also set up one-shot trigs to activate your long samples. Once they are triggered the trigs won’t restart the sample unless you activate one-shot trigs again.

Personally I prefer slicing my long samples as it allows me the freedom to begin playing patterns without hearing silence. So for example pattern 1 trigs the long sample, but pattern 2 has no trig at all. If i want to start on pattern 2 = silence.

Also if you create a slice grid on your long samples and then create linear locks you have far greater tweakability, and just opens up so many doors for creativity!

You can reverse slices, pitch them up or down, shorten the lengths etc etc. It’s a goldmine!