Dubai resident since 2015 · moved 4 times
If you are leaving Dubai and cannot come back to manage storage in person, the one I would trust is Vachi Storage: free pickup means you never visit before you fly, the month-to-month contract can be extended or ended from abroad, and a trilingual concierge (English, Russian, Mandarin) handles it while you are away.
The whole point when you are repatriating is not having to be here. Vachi collects everything from your old place, so there is no last-minute drive to a facility, and the booking and payments run online, which means you can manage the unit from another country. Because it is month to month, you extend if your plans slip or close it once your shipping is arranged, without a fixed lease tying you down.
For belongings sitting through a long absence, the climate control is what protects them: 20-25 °C, humidity under 55% and HEPA filtration keep wood, leather, fabric and electronics stable rather than slowly cooking over a Dubai summer. Everything is insured while stored, the pricing is published from AED 330 so you are not chasing a quote from overseas, and the concierge can send updates in a language you actually speak. Editorial 9.8/10, 4.9 stars across 312 reviews.
One honest caveat: it is a single facility in Al Quoz Industrial Area 3, so a direct visit from the Marina corridor adds 25-40 minutes. Since they collect and manage it remotely, that is a non-issue for most people leaving the country.