Choosing nas storage & drives often means balancing a capable enclosure against the hardware needed to make it usable. The Netgear ReadyNAS 2100 RNRX4410-100NAS has four bays and a rackmount design, but it arrives without hard drives and without a power adapter. That makes the real question less about the enclosure alone and more about whether you already have compatible parts for the setup.
Quick verdict
At USD 149.99, the Netgear ReadyNAS 2100 is worth considering for a shopper who specifically wants a four-bay network attached storage enclosure and is prepared to add the required hardware. Its listed PC and Mac compatibility, USB 3.0 specification, and support for 3.5-inch HDDs give it a clear role as a configurable home NAS foundation.
The important trade-off is immediate: the package is explicitly listed with no HDDs, and the power adapter is not included. Those are not minor accessories for a ready-to-use NAS, so the price should be viewed alongside the setup work and additional equipment required.
Netgear ReadyNAS 2100 RNRX4410-100NAS Rackmount Network Attached Storage NO HDDs

The strongest reason to choose the ReadyNAS 2100 is its four-bay layout in a rackmount network attached storage chassis. That combination suits someone planning a dedicated storage setup rather than a single-drive enclosure. The PC and Mac compatibility details also make the intended computing environment straightforward.
Its limitation is equally concrete: the unit is supplied without HDDs. The description also says that a power supply, charger, and other accessories are not provided unless clearly pictured or explicitly stated. Anyone starting from scratch will need to account for those requirements before the NAS can become part of a working storage system.
Who it suits
This NAS makes the most sense for a technically prepared buyer who already has, or intends to source, compatible 3.5-inch HDDs and a suitable power adapter. The four bays provide room for a multi-drive configuration, while the PC and Mac compatibility broadens its usefulness across common home-computing setups.
It is less suitable for someone looking for a complete, ready-to-connect home NAS. The no-drive configuration and missing adapter mean the USD 149.99 purchase is only one part of the setup, not the full storage solution.
What stands out from the listed details
The ReadyNAS 2100 combines a silver enclosure, four bays, HDD support, and USB 3.0 in one rackmount unit. It is also described as a used, refurbished, and tested device that may show cosmetic wear such as scratches or scuffs. That gives the condition an important practical angle: function is emphasized, while appearance may not be pristine.
Meaningful trade-offs
The central trade-off is convenience versus configuration. Four bays and PC/Mac support create a defined platform for a home NAS, but the missing drives and power adapter shift the remaining setup decisions to the buyer. The refurbished condition may also matter if a clean, unused appearance is a priority.
Bottom line
Choose the Netgear ReadyNAS 2100 if a four-bay rackmount enclosure at USD 149.99 fits your plan and you are comfortable supplying HDDs and the power adapter. Pass on it if you need an all-in-one NAS package with the essential hardware already included.