As stated earlier, all it takes to access the drives is to open the front bezel-cum-door.

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Installing and removing drives from the Thecus N0503 is a straightforward and fuss-free process.

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2.5″ drives are bottom-mounted in drive
cages, which go into a special enclosure. This enclosure, in turn, goes into
the N0503. It is possible to remove the cages even when the enclosure is installed.

13 Thecus N0503 ComboNAS

A simple but secure locking mechanism is used to secure the cages, allowing for quick hot-swap.

you’re planning on using 3.5″ drives, the 2.5″ drive enclosure has to be taken out as drive rails are used instead for 3.5″ drives.

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Thecus’ years of experience at making network storage devices
are evident in the N0503. Drive mounting and removal is a cinch and the overall build quality is good, with our only major gripe being the poor quality of the front bezel/door.