Khoa edits videos for three retainer clients. Client A lives in Google Drive. Client B insists on Dropbox. Client C, an agency, wants deliverables in their OneDrive. Every Friday, Khoa exported the week's final cut — usually 500 MB to 1 GB — and uploaded it three times. Same file. Three progress bars. Sequentially, because his upstream bandwidth couldn't handle two at once.
The low point was a delivery from a hotel in Da Lat: 800 MB × 3 uploads on conference Wi-Fi. He started at 9 p.m. and went to bed at 1 a.m. with the third bar at 60%.
The problem with "just upload it again"
- Your bandwidth is the bottleneck, multiplied. Three destinations means 3× your upload time — and home/hotel upstream is usually the slowest link in the whole chain.
- Failures don't coordinate. Upload #2 dies at 90%, and now one client has the file, one has half of it, and you've lost track of which.
- It doesn't scale with habit. Every new client with a different cloud adds another bar to babysit.
Multi-cloud upload: one send, N destinations
CloudSync's Upload page flips the geometry. You upload the file ONCE — to a relay that then fans it out to every destination you ticked, on datacenter bandwidth:
- Open Dashboard → Upload.
- Tick the destinations: any mix of your connected clouds — Google Drive, Dropbox, OneDrive, S3, R2, B2 and the rest — and pick a folder for each.
- Drop the files and hit Upload. One pass through your connection; the fan-out happens server-side, in parallel.
Khoa's Friday ritual is now: one upload, three checkmarks, laptop closed. The hotel-Wi-Fi scenario that cost him four hours costs him the length of a single upload.
Practical notes
- File size caps by plan: 50 MB on Free (enough to test the flow), 500 MB on Pro, 2 GB per file on Business.
- Nothing is stored with us: files stream through to your clouds and are gone from the relay when the upload completes.
- For recurring folders, use a sync rule instead: if the same local-to-many pattern repeats weekly, upload to ONE cloud and let scheduled syncs mirror it to the others automatically — then you don't even need to remember Friday.
Try it on the free plan — connect two clouds and send one file to both. The first time three checkmarks appear at once is oddly satisfying.