The most avoidable disappointment in gorilla photography is running out of storage capacity during the one-hour encounter. Unlike the approach hike — where you can stop and delete images to free space — the gorilla hour is irreplaceable: you cannot revisit it, you cannot slow it down, and you cannot recover a shot you missed because your card was full. The practical solution is straightforward: bring more storage than you think you need, and bring redundant backup storage for the same reason.
How much storage you actually need
The calculation starts with your shooting format and camera body. A modern mirrorless camera shooting compressed RAW files produces files of approximately 20–30 megabytes per frame, depending on the sensor resolution and the RAW compression setting. An hour-long gorilla encounter during which you shoot 300 frames — a moderate to conservative estimate for an engaged photographer — generates 6–9 gigabytes of RAW data. Add the approach hike, the departure hike, any lodge wildlife you photograph, and a buffer for unplanned additional shooting, and a single trekking day can easily produce 15–25 gigabytes of data.
A single 64GB card handles a full trekking day comfortably at this shooting rate. Two 64GB cards, or a single 128GB card, provides enough buffer for multiple trek days without needing to offload images daily — important given that laptop connectivity in remote Bwindi lodges can be unreliable and the time available for image management is limited. For photographers shooting in uncompressed RAW or dual-slot setups that write simultaneously to two cards, double these estimates.
Card speed and its importance in burst photography
Gorilla photography is well-served by burst mode — shooting several frames per second during the brief windows when an animal is moving, displaying, or engaged in behaviour that merits multiple exposures to ensure at least one sharp, well-composed result. Modern mirrorless cameras shooting at 10–30 frames per second generate buffer fill issues if the memory card write speed is insufficient to keep up with the data being generated.
Card write speed is measured in megabytes per second (MB/s), and the relevant specification is the write speed rather than the read speed that is more prominently marketed. For burst shooting at 10fps with 25MB RAW files, you are generating 250MB per second of data — a rate that requires a card with write speeds of at least 200MB/s to avoid buffer saturation. Most UHS-II rated SD cards and CFexpress cards of any type meet this requirement; standard UHS-I cards rated to 90–100MB/s write may not, and a card that fills the buffer quickly forces you to pause and wait at exactly the moments you most want to keep shooting.
The three main memory card formats for modern cameras are SD (UHS-I and UHS-II), CFexpress Type A, and CFexpress Type B. Sony mirrorless cameras use CFexpress Type A or SD cards depending on the model. Nikon Z-series cameras use CFexpress Type B or XQD. Canon R-series cameras use CFexpress Type B or SD. Check your specific camera’s accepted card formats carefully — buying the wrong type is a frustrating and expensive mistake to discover at the park gate.
Backup strategy: protecting images on a remote trip
The risk of card failure — though low with quality cards from reputable manufacturers — is non-trivial in tropical humidity conditions with the additional vibration of vehicle travel on rough roads. A card failure that takes your gorilla images before they have been backed up represents a loss that no amount of preparation can retrospectively prevent. The backup strategy should begin before you leave the lodge for the trek.
The most secure field backup approach is the twin-card setup: cameras with dual card slots should be configured to write simultaneously to two cards, so that every image is written to both cards at the moment of capture. If one card fails, the full set of images survives on the second. This doubles the card storage cost but provides genuine insurance against the specific failure mode that cannot be remedied after the fact.
For cameras with a single card slot, daily offload to a portable solid-state drive (SSD) is the minimum backup discipline. Several compact SSDs — including the Samsung T7, SanDisk Extreme Pro, and LaCie Rugged series — are available in capacities from 500GB to 4TB and provide sufficient storage for an entire multi-day trip without size or weight penalties that matter in a daypack. A card reader compatible with your card format is required for offloading from card to drive, and the process typically takes 15–30 minutes per 64GB card depending on card and drive speeds.
Cloud backup and connectivity limitations
Internet connectivity at Bwindi lodges ranges from absent to limited, and upload speeds to cloud backup services even where connectivity exists are too slow to be practical for large RAW image files. Cloud backup of gorilla images should be considered a post-trip activity — when you have returned to Kampala or your home country — rather than a field backup strategy. Attempting to rely on lodge WiFi for image backup creates anxiety and unreliable results; the portable SSD is the practical solution for the trip itself.
Some photographers in the Bwindi region use the Lightroom mobile app to create local backup copies on a smartphone while browsing and selecting images in the evenings. This creates a second copy of selected images on a separate device without requiring internet connectivity, providing meaningful additional redundancy for the images you have already identified as your strongest from each trek day. It is not a complete backup strategy but it is better than a single card and worth doing in the hours before sleep each evening of the safari.
