I want to know if there is a plan where I can share 6 Tb of files with my family

I am sorry for your loss.

To share 4TB of files, I think you have a few options -

Option 1 - You can get the Microsoft 365 personal subscription; if you don't need it for a year, you can subscribe for a month, and then you can add additional storage, up to 10TB, for your same account. https://www.microsoft.com/en-us/microsoft-365/onedrive/additional-file-storage Then you can upload these files to OneDrive and share from there.

Option 2 - Instead of getting the personal subscription, you can get the Family subscription, as it allows you to share the subscription with another 5 Microsoft account users, each user gets 1TB. The diffference here compared to option 1 is, the entire 4TB of data needs to be spread out among 4 different accounts, whereas Option 1 allows it to be all in one account.

Option 3 - Depends on how many people you need to share with, you can also just get external drive, put them in there and give the drive to the others.

Yes. A Microsoft 365 Family subscription is designed for this kind of scenario.

Key points from the available information:

1. Microsoft 365 Family storage per person
   • A Microsoft 365 Family subscription can be shared with up to 5 other people (6 people total).
   • Each person gets 1 TB of OneDrive storage.
   • Storage is per account, not pooled, but you can share folders so everyone can access common content.
2. Total capacity for your use case
   • With 6 people × 1 TB each, the family group has up to 6 TB total available across all accounts.
   • You could, for example:
     • Put the 4 TB archive in one or more family members’ OneDrive accounts (spread across accounts if needed), and
     • Leave remaining space in each person’s 1 TB for their own personal files.
3. Sharing the 4 TB of files with family
   • Upload the files into OneDrive (e.g., under Pictures or another folder structure).
   • Use OneDrive folder sharing so everyone can access the same content. Each person can also share folders from their own 1 TB so the family can “combine” storage via shared folders.
   • For general sharing steps, see the OneDrive sharing guidance in the references.
4. Important note about digital legacy
   • For future planning, OneDrive has a Digital legacy feature that lets someone designate another person to access their OneDrive if they pass away or cannot use their account. This can help avoid access issues for family members in similar situations.

In summary, a Microsoft 365 Family subscription gives up to 6 TB total (1 TB per person) and supports sharing folders so the entire family can access a large shared photo/file library while still keeping personal space.

References:

• Video: Share Microsoft 365 with your family
• Microsoft storage FAQs
• Preserve your digital legacy with OneDrive
• Share files and photos with family or Outlook groups