I have Alcatel OT Tab7 Dual Core Tablet. KEY FEATURES: Size:194 x 121 x 11.6 mm Weight:353 gr Screen:7 inch Display:TFT display, 1024 x 600 KEY SPECIFICATIONS: Operating System: Android 4.2.2 (Jelly Bean) Application Processor: Amlogic AML 8726MXS CPU: 1.5 GHz ARM Cortex A9, Dual core System Memory: 1GB RAM DDR3 Storage Capacity: 4GB NAND Flash Wi-Fi: 802.11 b/g/n Bluetooth: N/A Audio & Video Play: Built-in audio chip, 1080P HD playback External Interface: Micro USB, Micro SD Battery: 3000mAh Camera: Front 0.3 Mpixel,Rear camera 2.0Mpixel(for LATAM) In specifications Storage is 4GB NAND Flash, and on my Tablet it is about 2 GB. I don't know why? I don't know how much is the maximum GB for Micro SD. If anyone has more information for this Tablet, I would begged him to put data here.