Use TL-D800C as a high-capacity disk drive reader by setting up single disk mode
You can treat each disk in your TL-D800C as an individual storage space, and also use it as a removable drive. It can function like a high-capacity disk drive reader. When one of disk reaches data storage limitation, you can remove it and put it into a dry box. Then swap a different disk into the TL-D800C empty drive slot. After that, you can install the disk that reached full data capacity into the TL-D800C and connect it with a computer or NAS for direct file access.
Note: The operating system of the destination host should support the drive file system for file access. For example, NTFS (for Windows), HFS+ (for Mac), EXT4 (for Ubuntu or QNAP NAS), exFAT (for Windows, Mac, Ubuntu, and QNAP NAS) etc.