Privacy & security
The report gets seen, not saved.
You want the board to read the numbers on the big screen. You do not want a copy of those numbers living on the room's computer, in its recent files, or in its recycle bin. Those are two very different asks.
5 min read
Mar 2026
Every claim sourced · 2 references
A confidential quarterly lands in the boardroom. The natural move is to copy it onto the room's PC, open it, and present. The report is now also in that machine's Downloads, its "recent documents," maybe a temp folder and a thumbnail cache — long after you've left and forgotten about it.
✕ The myth
"I'll just open it on the room PC and delete it after."
One copy, one delete, no harm done.
✓ The reality
Opening a file scatters copies.
Recent-files lists, temp folders, previews and the recycle bin all keep traces. "Delete after" rarely finds them all — and the safest artifact is the one never created.1
Data-protection's first principle is minimisation: don't create or keep data you don't need.1 Applied to a presentation, that means the ideal is to display the report without ever writing it to the room's machine. Seen, understood, gone — with nothing to hunt down and scrub afterward, and nothing to surface in a future audit of that shared PC.
Display is not the same as transfer
The mental shift is separating "put these pixels on that screen" from "put this file on that computer." You only ever wanted the first. Streaming the view — the rendered slide — to the display accomplishes the goal while the underlying file stays on your own device, under your control. The room shows your report; the room never holds it.
Recent
Opening a file writes it into recent-documents and history lists.
Temp / cache
Previews and temp copies linger in places "delete" won't reach.
Minimise
The safest copy is the one that was never made.
1
⚖ The honest bit — "no file behind" has boundaries
It protects the room's machine, not the universe.
Be precise about the claim. Not landing a file on the room PC is real and valuable — but it doesn't stop someone photographing the screen, doesn't wipe the copy on your device, and if you deliberately email the board a copy afterward, that copy exists on purpose. "Leave no file behind" is specifically about not scattering unmanaged copies on hardware you don't control. For a leave-behind you actually intend, use a proper channel (a secure portal or expiring link), not a save to someone's desktop.
Where SyncBy!App fits
SyncBy streams the rendered slides from your device to the screen, so the board sees the report while the file stays on your phone or laptop — nothing is written to the room's computer and nothing is uploaded to us. When you genuinely want to hand the document over, do it deliberately through a controlled channel. For the common case of "let them read it on the big screen, then leave clean," this is exactly the tool.
TL;DR
- Opening a file on a room PC scatters copies — recent lists, temp, cache, recycle bin.
- Data minimisation: the safest artifact is one that was never created.1
- Streaming the view shows the report while the file stays on your device.
- Honest caveat: it protects the room's machine, not screenshots or deliberate hand-offs — use a controlled channel for those.