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In a Tom’s Guide reader poll reported on August 23, 2026, 42% of voters blamed photos and 41% blamed app cache for their phone-storage problems. Together, those answers account for 83% of that poll’s responses—not 83% of phone-storage problems generally. To find what is actually filling your phone, check its storage breakdown first, then remove or move only the files and data you have identified.
Why does my phone storage say it’s full?
Photos and app cache were the two largest answers in the Tom’s Guide poll, but the poll does not establish how common those causes are among all phone users. Its other reported answers were forgotten downloads (9%) and old games (8%). The four categories add up to 100% of the poll’s reported responses.
Your own storage screen is a more useful guide than the poll. The largest category depends on what you keep on your device, so look before deleting. The original poll report is at Tom’s Guide.
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On Android
- Open Settings and tap Storage.
- Review the categories and identify which one is using the most space.
Menu names and instructions can vary by phone; some Google instructions apply only to Android 14 and later. See Google Play Help’s storage guidance and, for Pixel-specific instructions, Google Pixel Phone Help.
#1 Best Overall
- [Dual Flash Drive] This 2-in-1 USB flash drive is designed with a Type-C plug and a USB-A plug at each end, working across all your Type-C Android phones, iPhone 15/15 Pro/15 Pro Max, iPhone 16/16Pro/16E, tablets, iPad Pro, Macs and USB-A computers, game consoles, car audios, and more (Not for Lightning iPhone/iPad).
- [Fast Speed] Optimizing the USB 3.0 technology, this USB-C flash drive fast transfers and backs up your high-res photos, videos, music, and heavy files at a read speed of up to 130MB/s and a write speed of up to 35MB/s, 10X faster than USB 2.0 flash drives.
- [Wide Use] This Type-C flash drive supports Windows, Android, Linux, and Mac OS, and is backward compatible with USB 2.0 ports. Plug and play, no need to install any software, working seamlessly with USB-C and USB-A devices.
- [Durable and Reliable] This dual USB 3.0 flash drive adopts superb memory chips thus ensuring extremely reliable performance, plus the premium plastic enclosure offers excellent heat dissipation. The cap protects the connectors from dust and damage, providing extended durability and security.
- [Compact and Portable] Constructed in a mini size of 63.5x17.8x8.4mm/2.5x0.7x0.3inch, this slim USB-C thumb drive can fit into your pocket, letting you enjoy the instant large capacity at any time.
On iPhone
- Open Settings.
- Tap General, then iPhone Storage.
- Check available space, the category breakdown and any recommendations shown for your device.
Apple’s storage categories can include apps and their content, photos, media, mail, Books, messages and attachments, locally downloaded iCloud Drive files, Other and System. See Apple’s instructions for checking iPhone and iPad storage.
How can I safely free space taken by photos and videos?
Back up photos or videos before removing their local copies. Confirm that the backup has finished and that you can access the account holding it; otherwise, deleting a local original could leave you without a usable copy.
Rank #2
- The 2-in-1 flash drive with a reversible USB Type-C and a traditional Type-A connector.
- Seamlessly move content between your USB Type-C smartphone, tablets, and Mac and USB Type-A computers. (Mobile device requires USB Type-C port and On-The-Go (OTG) support. See SanDisk website for list of compatible devices.)
- Free up space on your USB Type-C smartphone so you can take more photos (Mobile device requires USB Type-C port and On-The-Go (OTG) support. See SanDisk website for list of compatible devices.)
- Automatically back up photos with SanDisk Memory Zone app (Download and installation of SanDisk Memory Zone app required.)
- High-performance USB 3.2 Gen 1 drive with up to 400MB/s ultra-fast read speeds (1 MB/s = 1 million bytes per second. Based on internal testing; performance may vary depending upon host device, usage conditions, drive capacity, and other factors. USB Type-C port with USB 3.2 Gen 1 support required.)
Android
If your photos and videos are backed up with Google Photos, Google says you can delete the on-device copies and find the backed-up copies in the app when connected to the internet. Supported devices may also use Smart Storage to automatically clear backed-up photos and videos when storage is nearly full. Check the backup status and your device’s available options before deleting anything.
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Apple recommends backing up photos and videos to iCloud, then removing them from the device if you need to reclaim local space. Verify that the backup is complete before removing local originals. Apple’s Manage storage on iPhone guide explains its storage recommendations.
Rank #3
- 【Important】: Default format of the usb flash drive 128gb is exFAT as this is the format recognized by the smartphones and tablets. These 128gb thumb drives are only compatible with C-Port enabled mobile phones & computers only. While formatting the usb flash drive dual type c usb 3.0 OTG keep a check on the drive format
- 【Easy to Use】: Directly plug the 2-in-1 USB flash drive and play, no need to install any software. The jump drive is easy to be recognized by computer, laptop, notebook, PC, car audio, speaker, smart TV, vidoe projector etc
- 【Fast Speed】: High-speed USB 3.0 flash drive for fast data transfer, backwards compatible with USB 2.0 easy to complete the storage and transport functions. USB 3.0 and Class A chip help you transfer a 4G movie from the thumb drive to your smartphone in about 40 seconds, and reverse transfer in 2 mins to save memory for your smartphone with Type C port.Save your time
- 【Good Compatibility】: Dual connectors USB type C + USB 3.0. Support windows 7 / 8 / 10 / XP / 2000 / ME / NT Linux and Mac OS, compatible withUSB 3.0 & USB 2.0 backwards USB1.1. Support videos formats: AVI, M4V, MKV, MOV, M P4, MPG, RM, RMVB, TS, WMV, FLV, 3GP; AUDIOS: FLAC, APE, AAC, AIF, M4A, MP3, WAV
- 【OTG Function】:Support nearly all mobile phones which support OTG function,and very easy to operate
Can I clear app cache without deleting app data?
On Android, cache and app storage are different controls. Clearing cache deletes temporary data; an app may take longer to open the next time while it recreates that data. Clearing storage permanently removes all app data, which may include settings or locally saved information. Google’s warning is explicit: “Clear storage Permanently deletes all app data.”
Android: clear cache, not storage
- Open Settings, then find the app in the apps list. The exact menu path varies by phone.
- Open the app’s storage controls and choose Clear cache.
- Avoid Clear storage unless you intend to erase the app’s data and understand what may need to be set up or restored again.
Clearing cache is not guaranteed to free much space: check the app’s storage details first. Google outlines the distinction in Free up storage on your Android device.
Rank #4
- Dual Flash Drive Design: This 2-in-1 USB flash drive is designed with a Type-C plug and a USB-A plug at each end, working across all your Type-C Android phones, iPhone 15/15 Pro/15 Pro Max, iPhone 16/16Pro/16E, tablets, iPad Pro, Macs and USB-A computers, game consoles, car audios, and more (Not for Lightning iPhone/iPad)
- Fast Speed Performance: Optimizing the USB 3.0 technology, this USB-C flash drive fast transfers and backs up your high-res photos, videos, music, and heavy files at a read speed of up to 130MB/s and a write speed of up to 35MB/s, 10X faster than USB 2.0 flash drives
- Wide Compatibility: This Type-C flash drive supports Windows, Android, Linux, and Mac OS, and is backward compatible with USB 2.0 ports. Plug and play, no need to install any software, working seamlessly with USB-C and USB-A devices
- Durable and Reliable Construction: This dual USB 3.0 flash drive adopts superb memory chips thus ensuring extremely reliable performance, plus the premium plastic enclosure offers excellent heat dissipation. The cap protects the connectors from dust and damage, providing extended durability and security
- Compact and Portable Size: Constructed in a mini size of 63.5x17.8x8.4mm/2.5x0.7x0.3inch, this slim USB-C thumb drive can fit into your pocket, letting you enjoy the instant large capacity at any time
iPhone: cache is generally system-managed
Apple says iPhone manages cached and temporary files and removes them when it needs space. There is no universal Settings control that clears every app’s cache. Avoid treating the iPhone’s “Other” or System category as a folder to delete manually; Apple notes that cached music, videos and photos can appear under “Other” in Finder, Apple Devices or iTunes, and that the device handles cached and temporary files as needed.
What else should I check if photos and cache are not the problem?
- Downloads and offline media: Review downloaded files and media stored inside the app that downloaded them. Deleting a file from one location may not remove a separate copy kept by an app.
- Unused apps and games: Remove apps you no longer need. Android may automatically archive apps that are not used often while retaining personal data, subject to the app remaining available on Google Play. On iPhone, check the app’s storage entry and Apple’s recommendations before choosing whether to remove it.
- Messages and attachments: Large videos, photos and other attachments can take space. Apple specifically recommends checking messages and attachments.
- Files and locally stored videos: Check files, downloaded videos and locally downloaded iCloud Drive content. Make sure you do not need a file before deleting it.
- Mail, Books and other app content: On iPhone, these can appear in the storage breakdown alongside apps, media and system categories.
Android also provides options to review downloads, app data and unused apps. For platform-specific details, use Google’s Android storage help or Apple’s iPhone storage guide.
Best Value
- 【Versatile Storage Expansion – For Gaming, Work & Everyday Use】 Running out of space on your PS5 or Xbox Series X/S? This external hard drive lets you store and play PS4 / Xbox One games directly, instantly freeing up your console’s internal storage for next‑gen titles. At the same time, it handles work file backups, media libraries, and cross‑device data transfers with ease. One drive, all your needs. *（Note: PS5 / Xbox Series X|S games cannot be run or stored directly from the external hard drive. However, by offloading your PS4 / Xbox One games, you can free up valuable space for newer titles.）*
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Should I archive, offload or delete an app?
These options trade immediate space savings against how much app information or installation convenience you keep. Use the choice that matches whether you still want the app and whether its content is recoverable.
Quick Recap
| Choice | What it does | What to check |
|---|---|---|
| Clear Android cache | Removes temporary app data; the app may be slower on its next launch. | Choose cache rather than storage if you want to avoid erasing all app data. |
| Clear Android app storage | Permanently removes all app data. | Use only if you accept losing locally stored app information or know how to restore it. |
| Archive an Android app | Can free space while retaining personal data; Android may archive infrequently used apps automatically. | The app must remain available on Google Play for reinstalling. |
| Remove an app | Deletes the app from the device and can free its app storage. | Check whether its documents, downloads or other content are stored separately and whether you need them. |
| Remove local copies of backed-up photos | Frees device space while leaving backed-up copies available through the relevant service. | Confirm backup completion, account access and the conditions for viewing the remote copies. |
A safe order for freeing space
- Check the built-in storage breakdown and note the largest category.
- Review that category’s contents before deleting anything.
- For photos or videos, confirm a complete backup and account access before removing local copies.
- For Android apps, clear cache if temporary data is the target; do not confuse it with clearing app storage.
- Check downloads, app-held media, messages, files and unused apps if the main category remains unclear.
- Return to the storage screen to confirm that space was freed and decide whether another category needs attention.
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