Windows 10: LG Blu-ray formatted M-DISC

Hello,I went to use the LG bp50nb40 Blu-ray Disc write drive to load more pictures from my phone to an M-DISC using a new computer. The M-DISC already had many picture and movie files already on it. The laptop computer asked "Use disc like a USB flash drive or with a CD/DVD player?" I selected "like a USB flash drive", and the computer seemed to try and format the disc. There was an error that the format could not be completed. At that point, I tried to access the old files from the M-DISC and it's empty. Have I lost all my previous files? Is there any way to recover? I'm trying Puran file r

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File Format for Long-term Data Storage, Burning of Blu-Ray M-Discs

I have a couple of drives marked as Blu-Ray and one includes M-Disc. As far as I can tell the two types are different, Blu-Ray has higher capacity such as 25GB [versus DVD+R/DL at 8GB] and M-Disc is for long-term storage. At $10USD each the M-Disc is still languishing at a dealer.

As for file formats one would be betting upon which would remain in use the longest but probably the .rtf/Rich Text Format for documents may be the most universal as a large number of programs can read them.

 

Blu-ray Disc Association New Ultra HD Blu-ray Specification and Logo

Source: Blu-ray Disc Association Completes Ultra HD Blu-ray™ Specification and Releases New Logo | Business Wire

 

File Format for Long-term Data Storage, Burning of Blu-Ray M-Discs

The conventional thought is that when you store data for long-term storage, you convert the data into a format that will last for decades. It should be in NTFS or FAT and file formats that will be around in decades.

For example, they do not recommend that files should be left in docx (Word format) because you don't now if Microsoft will be around 10 years from now. They suggest that formats such as txt.

HOWEVER, I have most of my documents in Microsoft Word and Excel. And, the formatting of the document is actually really important to me. It allows readability of the document. If it's all in the same regular text, it makes it much harder to read.

What do you people suggest that I should do? I want to burn my long-term files but what format do you recommend that I should save it in on my blu-ray M-discs?