This listing states that the camera supports up to 128GB cards in one place, and up to 256GB cards elsewhere. What is the real maximum card size?

The real maximum card size supported by the camera is up to 256GB.

Questions & Answers: Reolink RLC-510A 2PACK, Outdoor Security Cameras, Home Security Camera System for 5MP PoE IP Surveillance, Smart Human/Vehicle Detection, Work with Smart Home, Time-Lapse, Up to 256GB SD Card

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Reolink RLC-510A 2PACK, Outdoor Security Cameras, Home Security Camera System for 5MP PoE IP Surveillance, Smart Human/Vehicle Detection, Work with Smart Home, Time-Lapse, Up to 256GB SD Card

SMART PERSON/VEHICLE DETECTION: The cameras identify true threats in the light of cutting-edge detection algorithms, giving you the utmost peace and relief.
EXCEPTIONAL 5MP SUPER HD: These PoE IP cameras boast 5MP videos, capturing passing moments in ultra-sharp resolution without missing key details. With 18 specs IR lights and 3D-DNR technic, the cameras are capable of delivering up to 100ft astounding night vision.
TIMELAPSE TO SEE THE DAY IN A MINTUNE: These cameras support recording time-lapse videos. You can see the whole construction process in a few minutes (Time lapse only works on Reolink App.)
FREE APP AND REMOTE ACCESS: Explore rich features and functions in Reolink free Apps for IOS, Android, Windows PC, and Mac with no subscription fee.
MUITIPLE RECORDING OPTIONS: These cameras support recording 24/7 or motions detected to a 128GB micro SD card(not included), FTP server, NAS and Reolink PoE NVRs without extra fee.

$104^.99 –