this time
Loading your saved state.
this time
Refers to this one current occasion, in contrast to earlier or future times.
Letztes Mal war es zu voll, aber diesmal haben wir Glück und finden einen Platz.
Last time it was too crowded, but this time we're lucky and find a seat.
'Diesmal' (this time) is a fixed combination of 'dieses Mal' (this time) and is always written as one word. It means 'on this occasion' or 'at this point in time'.
Diesmal möchte ich das Spiel gewinnen.
This time I want to win the game.
As an adverb, 'diesmal' (this time) can stand in different positions in the sentence. If it is in position 1, the conjugated verb follows directly after it (inversion). It can also stand after the verb and subject.
Diesmal komme ich pünktlich.
This time I'm coming on time.
'Diesmal' (this time) is often used to express a contrast with a previous experience. Even if the earlier moment is not mentioned explicitly, the comparison is often implied.
Ich hoffe, die Prüfung ist diesmal einfacher.
I hope the exam is easier this time.
now
'jetzt' and 'diesmal' can both point to the current situation. The difference is: 'jetzt' means the present moment. 'diesmal' means this one time in comparison with other times. They are easy to confuse when something is happening right now and is also a repeated event. If it is only about the time, 'jetzt' fits. If you want to say that this attempt, visit, or appointment is different from usual, 'diesmal' fits.
Diesmal kommt das Team pünktlich zum Training.
This time the team arrives on time for training.
Die Kundin möchte jetzt mit der Ärztin sprechen.
The customer wants to speak with the doctor now.