Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
For the choice of storage, I always choose Amazon S3 for my clients. Trustworthy yet affordable (only around $0.03 per GB per month). So just $30 per TB. For your case, it would be around $240 per month (8TB). And I use CloudBacko backup software as the tool, as it allows me to choose Amazon S3...