can't reformat an external drive

The big questions...

Specific make/model of drive?

How much did you pay for a 30TB SSD? Should be at least $3,000+ USD because if it's not, it may very well be a scam. In other words, too good to be true.

Sadly, there's a lot of fake drives for sale that do funky things to fool the OS into thinking it has that capacity but you will soon find out that it's far less storage in reality. If it's something you can disassemble, you will be able to quickly tell it's missing quite a few flash chips. There should be quite a few flash chips and the drive would be heavy. If it's feather light it could be as simple as a super cheap flash chip equivalent to what's in thumb drives and just some fancy firmware chip that lies to the operating system.

All of the Toshiba sites which talk about the 30 TB drive say it's a HDD, not an SSD. I believe you may have been scammed as James has already pointed out.

Read these sites:

Toshiba 30GB Hard Drives (HDD, SSD & NAS) - eBayeBayhttps://www.ebay.com › Toshiba-30GB-Hard-Drives-...

Toshiba Details Plans for 30TB and Larger HDDsTom's Hardwarehttps://www.tomshardware.com › News

Toshiba reveals 30TB disk drive to arrive by 2024The Registerhttps://www.theregister.com › 2022/02/09 › 30tb_tosh...

I would contact the vendor and demand a full refund. If there's any question contact your credit card company and open a fraudulent sales incident. On second thought I'd contact the credit card company first.