For free uploads we only support standard media. With a nostr.build account, you can upload .pdfs and .zips (can have an excel in it), but not excels directly no.
More detail on features and file types here:
Can the excel file be hosted on nostr:npub1nxy4qpqnld6kmpphjykvx2lqwvxmuxluddwjamm4nc29ds3elyzsm5avr7 or similar? Having trouble downloading to iPhone using safari 
For free uploads we only support standard media. With a nostr.build account, you can upload .pdfs and .zips (can have an excel in it), but not excels directly no.
More detail on features and file types here:
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