ATM services. what is lowest amounts they carries
Short answer:

As low as a few thousand euros, but usually not less than 10,000–20,000 EUR per bag.
Details:

If they’re refilling a low-use ATM (like in a village or quiet place), it might be just 5,000–10,000 EUR.

Standard city ATM bags often carry 40,000–80,000 EUR, split by denominations.

Bags are often denomination-sorted (like one bag for €10s, one for €20s, etc.).

For cash pickups (from full machines), they may carry whatever the ATM collected, sometimes over 100K EUR total — but split across several heavy-duty bags.