Resolve the laptop-fit conflict first
Screen diagonal is not the laptop's width, height or thickness. Ask for the usable compartment measurements and compare all three dimensions with the device in its usual case. If the seller cannot reconcile 17-inch title wording with the 16.3-inch bullet, treat the smaller claim as a caution rather than assuming extra room.
Separate school access from security wording
The seller describes a separate laptop compartment and a roomy packing compartment, while the title mentions a combination lock. Inspect how folders and books enter the packing area and which closure the lock controls. The lock may discourage casual zipper access; it does not prove every pocket is protected or make the backpack theft-proof.
