A single 128GB card feels like plenty for a week-long trip — right up until you actually multiply your average daily shot count by the number of days. Our Storage calculator offers a daily mode alongside its direct shot-count entry: enter your average shots per day and trip length, and it works out the total for you, so you can decide how many cards to pack and what your backup plan looks like before you leave.
Why daily shots × trip days adds up faster than it feels
Between a morning walk, an afternoon out sightseeing, and evening shots after dark, 300 photos in a single travel day isn't an unusual number. The problem is that number compounds directly with trip length. 300 shots a day for 7 days is 2,100 photos; stretch the same trip to 10 days and it's 3,000. "I'll probably shoot this much per day" doesn't make that total feel real on its own, which is why running your average daily count and trip length through the calculator's daily mode should be the first step before you even start packing.
RAW versus JPEG changes your card math completely
For the same shot count, file format alone can nearly triple the storage you need. On a modern full-frame camera, compressed RAW runs about 30MB per shot versus roughly 8MB for JPEG — so that same 300-shots-a-day-for-7-days total of 2,100 photos needs about 63GB in RAW but only around 17GB in JPEG. Travelers often lean toward RAW for the extra room to recover exposure and white balance later, but if a good share of your shots are casual sightseeing snapshots that don't need heavy editing, shooting JPEG for those — or RAW+JPEG with RAW reserved for the shots that matter — cuts the storage burden significantly.
Backup copies are part of the real number you need
The calculator's output includes total storage with your chosen number of backup copies factored in, not just the raw shooting total. Cards can get lost or damaged on the road, so keeping at least one backup copy — copying files to a laptop or a portable SSD each evening — is standard practice, and that doubles your original total. Add one backup copy to the 63GB RAW example above and you need 126GB, so plan cards and external storage around that backed-up total, not the card capacity alone.
Splitting storage across several cards is often safer than one big card
The calculator also divides your total by a chosen card size to tell you how many cards you'll need. If that 126GB total gets packed onto a single 256GB card, losing or damaging that one card means losing the entire trip's photos at once. Splitting the same total across two 128GB cards, or four 64GB cards, limits any single failure to that card's share — so for a trip where reshooting isn't an option, spreading the same total capacity across multiple cards is generally the safer call.
If you're backing up to the cloud over hotel Wi-Fi, check the upload time too
The calculator also estimates upload time from your total storage and connection speed. At a fairly typical hotel Wi-Fi upload speed of 10Mbps, uploading 63GB (the RAW example above) takes roughly 14 hours — tight to finish overnight. Uploading each day's shoot in smaller batches as you go is far more realistic than trying to push everything up on the last night of the trip and running out of time.
Practical checklist
- Run your average daily shot count and trip length through the calculator's daily mode to get your real total first.
- Decide upfront whether you're shooting RAW, JPEG, or a mix — the storage difference is nearly 3x.
- Plan cards around the total including backup copies, not the original shooting total alone.
- For the same total capacity, splitting across several cards is usually safer than relying on one large card.
- If you're backing up to the cloud over hotel Wi-Fi, check the estimated upload time and spread uploads across each night instead of saving it all for the last day.