Hi,

you have three types of backups.

full - which can be restored independent from any other backup

differential - which is based on the recent full backup

log - which is based on the recent differential or full backup

In conclusion that mean:

1. Restore the recent full backup

2. Restore the recent differential backup after the before restored full backup - and forget all log backups before this differential backup

3. Restore all log backups after the before restored differential backup in the timely order

I hope that makes it clear enough. 😉