Can the internal hard drive be replaced?

Tables doesn’t have a internal connector for the internal Storage, the NAND (The Memory Chip) is soldered to the motherboard, if you want to upgrade is cheaper find a motherboard with more storage, if you need data recovery because is not turning on anymore you need to remove the NAND and use a NAND to USB or to SERIAL for connecting it to a Computer and Recover Data.

Everything is Possible, actually if you want to remove and install a new Storage (NAND) is Possible, with a GOOD Micro-Soldering Skills , Tools and Programming Software you can accomplish this task.

If you don’t have the tools and time is better Replacing Motherboard, or you can go to China Streets, those guys do it in front of you.