der Zugriff
access
The technical possibility or permission to access data, a system, or a network.
Ich habe keinen Zugriff auf diesen Ordner im System.
I don't have access to this folder in the system.

access / raid
Loading your saved state.
access
The technical possibility or permission to access data, a system, or a network.
Ich habe keinen Zugriff auf diesen Ordner im System.
I don't have access to this folder in the system.

'Der Zugriff' (access/raid) is derived from the separable verb 'zugreifen' (to grab/take hold of). The verb literally means 'to reach for something' or 'to take something for oneself,' which explains the meaning of the noun.
Beim Buffet hat jeder kräftig zugegriffen.
At the buffet, everyone helped themselves generously.
In most meanings, 'Zugriff' (access) is used with the preposition 'auf' and the accusative. You have 'Zugriff auf etwas' (access to something).
Haben Sie Zugriff auf die Kundendatenbank?
Do you have access to the customer database?
In technical contexts, 'Zugriff' (access) is often combined with verbs such as 'haben' (to have), 'bekommen' (to get), 'erlauben' (to allow), or 'verweigern' (to deny).
Der Administrator hat mir den Zugriff auf die Datei erlaubt.
The administrator allowed me access to the file.
You can recognize the meaning 'police action' from words like 'Polizei' (police), 'Spezialeinheit' (special unit), or 'Festnahme' (arrest). The typical verb in this context is 'erfolgen' (to take place).
Der Zugriff der Polizei erfolgte ohne Vorwarnung.
The police raid took place without warning.
availability / order
'die Verfügung' and 'der Zugriff' can both mean that you can use something or have the right to do so. 'Zur Verfügung stehen' says generally that something is available. 'Verfügung über etwas haben' emphasizes control or decision-making authority more. 'Zugriff' fits especially well when you can access data, a system, or an account. Learners may confuse the words because both have to do with use and permission. As a simple guide: with people, money, time, or things, 'zur Verfügung' is often more natural; with computers, data, and systems, 'Zugriff' is usually more precise.

Nach dem Update hatte Anna keinen Zugriff mehr auf die Kundendaten.
After the update, Anna no longer had access to the customer data.
Für das Projekt stehen uns zwei Räume zur Verfügung.
We have two rooms available for the project.