The catch with SSDs is they are not long-term reliable when left without power. If left as little as 12 months without energy, data degradation can occur. SSDs need power regularly to automatically refresh their memory cells. No power, no refresh, slow loss. They are almost like RAM in that regard, just with a really slow discharge.

Compared to good quality writable media which is designed for storage without power. This, and the write-once versions (no ransomware), are great for backups of faster modern media.